All universities in India accept the IB Diploma as equivalent to Class 12 qualification from an Indian board.
However, acceptance alone does not guarantee entry into a course. Entry is based on competition as places may be limited and some courses may have additional selection requirements. It is advisable to check with the institution of interest to determine the entry requirements for particular courses of study.

For greater detail on recognition of IB programmes in India, please refer to the link given below for details:
http://ibo.org/contentassets/d883e8b8f46446079f14679a9a6971c3/india-recognition-guide-jan-2017.pdf