What should I study to clear NIMHANS entrance exam for M.Phil. in clinical psychology?

In order to clear the NIMHANS entrance exam for M.Phil. In clinical psychology, you should be thorough in the basics of the syllabus prescribed for a PG in psychology. Consider studying topics like cognitive psychology, Biological basis of behavior, abnormal psychology, social psychology, and research methodology.

In reality, clearing the MPhil entrance is just a small step of the whole process. You should be mentally strong enough and have the ability to report to different people and tolerate their valid criticism. You will have to learn to work together with people from different disciplines, develop a passion for your patients, and spend long working hours including Saturdays. The bright side is, that you will be working with some of the highly intellectual people who will guide you to manage both academics and clinical work. 

I am sure, eventually, you will realize that all the efforts were worth the result!