Who among the following has served as the Chairperson of the National Commission for Women?

Dr. Girija Vyas served two consecutive terms as the 5th Chairperson of the National Commission for Women (from February 2005 to February 2008 and from April 2008 to April 2011), nominated by the Central Government under Section 3(2)(a) of the National Commission for Women Act, 1990. None of the other options has served as Chairperson of the National Commission for Women: Krishna Tirath served as Union Minister for Women and Child Development, Chandresh Kumari Katoch served as President of the All India Mahila Congress and Union Minister of Culture, and Ambika Soni served as Union Minister of Information and Broadcasting and of Tourism.