All India Institute of Medical Sciences, Delhi

Hi,
AIIMS is a government funded institution. So, there is a caste based reservation. Either way, somehow the cut-off rank reaches 100+ AIR (Gen. category seat) for AIIMS-Delhi. 58 percentile is very far from the same.

Most probably, yes. It may depend on your performance there.

Score minimum 55% in your PCMB and you can do that if you aim for 80%.
The fees for AIIMS is variable but it is less as compared to that of the other institutions. As AIIMS is in top medical college list of India so its cutoff is high. You need around 97+ percentile in NEET for the same.

The last date of registration was 28th April.

Hey Shuvam!
For admission in St. Xavier's College, Kolkata with B.sc Honours in microbiology, you must have Mathematics as a compulsory subject.
Kindly go through the link of eligibility criteria
http://www.sxccal.edu/admissions/SXCAdmission2018/UG8102/EligibilityCriteria.htm
I hope this helps.
AIMS PUNE admission procedure:
https://www.google.co.in/url?sa=t&source=web&rct=j&url=http://www.aimsinstitute.in/admission_details.html&ved=2ahUKEwjzkI3z44rbAhXZXSsKHV0zBR8QFjABegQIBxAB&usg=AOvVaw1eZhdLNBZb9OtnWVd8CcgI
AFMC admission procedure :
http://www.afmc.nic.in/#nogo22
Good luck Shuvam!