Is it necessary to a candidate that he/she must have all the four subjects in order to get admission in iiser?

Dear Student,

As per the eligibility criteria for IISER admissions, you will be required to have an aggregate score of five total subjects. Among the five subjects, Three of the subjects should one Language subject along with Physics and Chemistry. The fourth subject can be either Mathematics or Biology. The fifth subject should be any other subject apart from the ones that have been mentioned.

Feel free to write back with further queries.