dear aspirant,hope you are doing well.Now coming to your question, NIMHANS is one of the most prestigious institutes for Post Graduate Medical studies in India.
About 20,000 aspirants take the NIMHANS entrance exam for entry into 6 year DM/MCh and 3 year MD Psychiatry at NIMHANS.
This blog will familiarize you with various details pertaining to the NIMHANS entrance such as the Scheme and Pattern of Exam, Important Dates and some preparation tips.
 NIMHANS is an online objective pattern PG Entrance Exam conducted for admission to direct M.Ch. Neurosurgery/DM Neurology and MD Psychiatry courses.
A common entrance exam is conducted for all these courses and a separate Merit list is published for every course.
The exam is conducted twice a year – for the January and the July session.

hope this will help.