Hello
You should score in excess of 50% in aggregate of your physics, chemistry and biology in your class 12th standard CBSE examinations to be eligible for appearing and qualifying as well as participating in the counselling of neet examination
unless you have the aforesaid subject combination or get the bare minimum marks which are stated above then you will not be eligible to participate in the verification rounds and counselling for neet

Hiii

For going into medical field one has to appear in the Nation eligibility cum entrance test (NEET) . For being eligible to appear in neet a candidate must have to qualify the class 12th examination with Physics, Chemistry and Biology/Biotechnology and must have 50% aggregate marks. 

Hope this helps

Thanks!!!