After doing some research online, I gathered some information regarding your question. Let me mention these which you can later analyze and check if it is useful or not.

• It is an online MCQ-based Post Graduate entrance exam for direct MCh Neurosurgery, DM neurology, and MD Psychiatry courses.
• The exams are usually held in the last week of March.
• It is a 2-hour long exam and comprises 150 MCQ-based questions.
• 1 mark is given for every correct answer and ¼ mark will be deducted for every wrong answer.
• 90-100 questions generally come from the routine subjects studied during MBBS. These are similar to the ones asked in other entrance exams like AIIMS and JIPMER.
• 50-60 MCQs are related to Neurology sections of all other subjects like anatomy, physiology, biochemistry, microbiology, pharmacology, pathology, ophthalmology, medicine, surgery, psychiatry, radiology, and anesthesia.

For preparing Neurology you can take help from the following books:

• Harrison for Neurology
• Ganong for Neuro-Physiology
• Snell's Neuro-Anatomy
• Neuro-Biochemistry from Harper
• Neuro-Microbiology from Paniker
• Neuro-Pharmacology from KDT
• Neuro-Pathology from Robbins

Try solving the previous 4 to 5 years of any NIMHANS MCQ guide. Also, try to score 120-130, this will secure your place among the top rankers.