How should one prepare for the NIMHANS, post-MBBS exam, and MCH neurosurgery while in medical school?

Here are some highly recommended books you must go through at least once if you are preparing for the NIMHANS post-MBBS exam and MCH Neurosurgeon 

1. Harrison's Neurology and psychiatry portion
2. Bailey and Love's Neurosurgery and Trauma section
3. Neuroanatomy from Snell's or Gray's 41st edition 
4. Ganong's Neurophysiology
5. Robbins Neuropathology, diseases of nerves, diseases of muscles
6. Neuro-psychopharmacology from Katzung's
7. Retinal diseases and Neuro-ophthalmology from Parson's
8. Neuro-radiology from Dr. Sumit Sethi's book.

By going through these excellent reads, you will definitely have an edge over others. However, it’s important to note that one needs to be thorough with MBBS concepts. The PG exam comprises 70% general and 30% neuro/psychiatry-specific questions so invest your time accordingly.