Mamta Sharma was the Chairperson of the National Commission for Women (Rashtriya Mahila Ayog) from 2011 until the end of her term in August 2014. Lalitha Kumaramangalam was appointed as the next chairperson in September 2014. Since the question asks about the chairperson "presently" in 2014, and Mamta Sharma held the position for the majority of the year until late August, she is the correct answer based on the likely timeframe the question refers to within 2014.