AIIMS exam is the entrance test for getting into AIIMS, Delhi and the other branches in India. AIIMS, Delhi is known to be one of the most prestigious college and hospital in the world. The entrance test is also quite different from the NEET exam as the AIIMS is more understanding and presence of mind based where they test the student's intelligence rather than his remembering capabilities.

If you have prepared for your NEET really well then you have a chance to practice the previous papers and model question papers in these 20 days to put up a good enough score. Take more General knowledge and Aptitude tests and you can easily secure 20 marks in the part if you do it well and while being able to save some time you have a chance to gain 10-15 marks easily. So it's better that you practice more and more papers in these 20 days.

There are many videos and tutorials that will take you in for "Crack AIIMS in 15 days" coaching and they will end up wasting this precious time that you have. So believe me and focus all your time on practice and reading past year's news and achiements. This will increase your chances of going past the 120 marks benchmark you've set. All the best to you!