I am in 11class and my logical and reasoning section is very weak .what should I do to clear AIIMS

all you need to do try previous year question papers and try seeing how does it work, if you can make your own methods to solve a problem then try applying it to other problems of same type, if else learn from basics see were you are weak and try learning it prefectly without any doubts if anu doubts there are so many platforms were you can clear your doubts and there are your teacher ask them about it. there are videos online to help you with it. there are so many books which has plenty of question try solving them, rather than going to the methods metioned why dont you try solving them in your own ways, and apply them when you find the similar question see whether it works for all and then there will no weakness because its your own method of solving them.