NTA
The National Testing Agency, which conducts JEE Main, NEET, CUET and several other national exams.
The NTA was set up in 2017 to run large entrance tests. Each exam has its own website (jeemain.nta.nic.in, neet.nta.nic.in, cuet.nta.nic.in) with the information bulletin that is the final word on eligibility.