The correct answer is Governor, Reserve Bank of India. The ? 100 denomination banknotes will bear the signature of Governor of Reserve Bank of India. Current Governor of RBI is Shaktikanta Das. (Sept 2020)Notes:The Reserve Bank of India (RBI) is India's central banking institution, which controls the issuance and supply of the Indian rupee. Until the Monetary Policy Committee was established in 2016, it also control monetary policy in India. It commenced its operations on 1st April 1935 in accordance with the Reserve Bank of India Act, 1934. The original share capital was divided into shares of 100 each fully paid, which were initially owned entirely by private shareholders. The RBI was nationalized on 1st January 1949.