Chairperson of the National School
Option 4 is the right answer.
Ratan Thiyam is a very well known and renowned theater personality from Manipur . He was appointed as the chairperson of the National School of Drama on 19 August 2013 by the President of India . He will serve this post for 4 years as the rules of the society. Ratan Thiyam also won the Sangeet Natak Akademi Award in 1987.