Hi Harshit,
Seriously speaking 140 marks out of 200 in AIIMS exams normally are not enough to get into AIIMS Delhi. But you might guide a call for counselling at the the other AIIMS which are lower in ranking. Since we do not know the general performance of the students across the country it isn't possible to guess if your marks would be enough. Supposing the paper was as it has been throughout the last few years I am sorry to say that 140 won't be enough for AIIMS Delhi in particular.
Thank you and all the best.

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