Choosing O Level Subjects in Pakistan: The Three That Decide Your Degree

Ask a Pakistani student how many O Level subjects they get to choose and they will say eight. It is the wrong answer, and believing it is how families close the door on medicine without noticing.

If you sit O Levels in Pakistan, IBCC requires eight subjects for equivalence — and five of them are fixed. Mathematics, English, Urdu, Islamiyat and Pakistan Studies are compulsory. That leaves three elective slots, and those three decide whether you can apply to medical college, to engineering, or to neither.

Three choices, made at fourteen, that set the boundary on every degree available at eighteen. This is how to make them properly. (If you are new to the qualification itself, what IGCSE is and how O Level, IGCSE and GCSE differ are the two-minute versions.)

You get three choices, not eight

The rule that closes doors: Science Group equivalence

IBCC does not simply issue "an SSC equivalence". It issues one in a group, and the group is what universities read. For SSC Science Group equivalence you need Physics, Chemistry and either Biology or Computer Science among your electives.

Read that carefully, because it contains a fork most families miss. Physics, Chemistry and Computer Science satisfies the Science Group. It does not satisfy medicine — the reported MDCAT requirement is eight O Level subjects including Physics, Chemistry and Biology, and a complete A Level in Physics, Chemistry and Biology on top. A student who took Computer Science instead of Biology at fourteen has a valid Science Group equivalence and a closed medical route.

The fourth elective question — whether to take a fourth science or a humanities subject alongside — is where genuine preference belongs. Once Physics, Chemistry and Biology are in place, everything else is upside.

Where you sat the exams changes the rules

The last two rows catch returning families every year. A student who did O Levels in Dubai or Jeddah on the five-subject basis, then came home for A Levels, does not inherit the abroad exemption — the three national subjects reappear, and they have to be sat. Plan for that at the point you move, not at the point you apply. Our O Level Pakistan guide sets out the documents, fees and process in full, and results day in Pakistan covers what happens the morning the grades land.

Grades: what your letters are actually worth

IBCC converts letter grades into marks, and two widely-repeated claims about that conversion are wrong.

An A* is not 90. The published general table gives A = 85, B = 75, C = 65, D = 55, E = 45 — but A* is a separate, subject-specific figure that is reissued every session. For the 2025 session it was 94 for Physics, Chemistry, Biology, Computer Studies, Mathematics, Islamiyat and other electives, and 93 for English, Urdu and Pakistan Studies. In 2023 the figures were different again. Always pull the table for your own session rather than reusing a number from an older article.

If your certificate uses the 9–1 scale, IBCC maps it separately: 9 = above 90, 8 = 87, 7 = 82, 6 = 77, 5 = 70, 4 = 60, 3 = 50, 2 = 40.

Choosing backwards, in four steps

1. Name the widest destination the student might plausibly want
   Not the one they say today. The widest one. At fourteen the goal is to avoid closing options cheaply, not to commit early.
2. Work out what that destination demands at O Level
   Medicine: Physics, Chemistry, Biology. Engineering: Physics, Chemistry, Mathematics. Business and humanities: far more flexible. If two destinations are live, take the intersection — which is usually the three sciences.
3. Check the Science Group rule is satisfied
   Physics, Chemistry and Biology or Computer Science. If your three electives do not contain that combination, the science route is closed regardless of grades.
4. Then, and only then, optimise for interest and grades
   Once the gates are met, take subjects the student will actually work at. A grudging A* in a subject nobody wanted is worth less than an enthusiastic one, and subject difficulty is real — but it should be the last input, not the first. From there it is ordinary work: how to revise properly and how many past papers it actually takes.

The grades still have to arrive

Every rule above is about eligibility. Eligibility gets you into the pool; grades decide what happens inside it, and O Level and IGCSE grades come from the same thing everywhere in the world — the number of real questions a student has attempted, been marked on, and corrected.

PapaMarks holds 170,000+ real and past-paper-style Cambridge and Edexcel questions with instant marking against the mark scheme, plus 462 revision-note sets, 135,000+ flashcards and 75 interactive tools. Because Cambridge O Level and IGCSE share most of their content, our IGCSE banks cover the O Level syllabuses closely — the mapping, and where it breaks down, is set out in the O Level guide. Start with the most-tested topics in Biology, Chemistry and Physics.

FAQ

Three slots, four years of consequences. Fill them with the combination that keeps the most doors open — usually Physics, Chemistry and Biology — then spend the next two years making the grades good rather than the choices safe. Open the subject library and create a PapaMarks account.