Hello,

To join IUCAA you need to give INAT exam which is conducted in pune for Ph.D course. The eligibility criteria for writting INTA exam is the candidate should possess their M.Sc., Integrated M.Sc., B..Sc. or B.Tech / B.E. / M.E. / M.Tech degree with 55% marks or more can apply for INAT 2020

OR The candidates in any branch of B.E. / B.Tech / M.E. / M.Tech degree or in Physics, Electronics, Astronomy or Applied Mathematics branches of B.Sc or M.Sc degree are eligible to apply.

OR talented final year B.Sc, 1st year M.Sc., 3rd / 4th year Intergrated M.Sc and 2nd / 3rd year B.E. / B.TEch students can also apply.

So after 12th you cannot get admission in the IUCAA