Hi Aspirant,

There is no limit for number of attempts for GAT-B in any category. One can apply for this exam at any age if he fulfill the required academic Criteria. The candidate should have completed Engineering with any stream from any recognized university. Candidate who are pursuing final year of Graduation course in Engineering can also apply for this exam.

For more information on eligibility and others of GAT-B refer the link below,

https://university.careers360.com/articles/graduate-aptitude-test-biotechnology

Hope this is resourceful.

Best of luck!!!