Dear Aspirant,

IISER is also known as the Indian Institutes of Science Education and Research Aptitude Test. This year it is scheduled to happen on May 31st 2020 which is also a Sunday.

Regarding your question, the eligibility criteria of IISER states that the candidates have passed 10+2 or equivalent exam with science stream to be eligible for the course. The applicants are admitted only through three channels to the course:

1. Kishore Vaigyanik Protsahan Yojana (KVPY) channel- If the candidate has a valid KVPY fellowship, they will be eligible to apply for the exam.
2. Joint Entrance Examination (JEE-Advanced) of the Indian Institutes of Technology- If the candidate has secured a rank within the parameter of 10000 in the Common Rank List of JEE Advanced, the candidate is eligible to apply.
3. State and Central Boards Channel (SCB)- If you have passed 10+2 with science, you can apply for IAT. But every board has specific marks cut-offs for entering the exam, so the candidate needs to meet that mark. These students will have to appear for the IISER Aptitude Test or IAT and get selected rather than the other two channels.

It states the subject should be science and science has two combinations- PCB and PCM. So you should have Physics and Chemistry mandatory and either Mathematics or Biology. If you have one of these combinations, you can apply for IAT. The subjects they consider for calculating your cut off are therefore as follows:

1. Physics
2. Chemistry
3. Maths or Biology
4. Language (If you have more than one, then the highest will be considered)
5. Any other subject with the highest marks otherwise

Hope this clears your doubts. All the best!