How should I prepare for aiims? What type of questions are being asked ? How should I prepare because I am average in physics chemistry and somtimes I also get stuck in biology?

@ yashi 
aiims is a difficult entrance exams and very competetive , so, u need solund preparation if u want to crack it with good rank , it ahve 972 seats but 2 lakh people are attending it , so, u can imagine the toughness of paper . 
they will ask you all mcq ques and half of the ques will be of assertion and reason type . 
and also the paper contains ques from G.K 
if u are average in phy then increase your level with that , u can even take the package from askiitian , we have explained the concept in a better way . 
just attend as many mock test as u can and last 5 years paper of aiims . 

ALL THE BEST ..