Explanation:

Statement 1: He spent his life advocating political rights and social freedom for Dalits. In 1956 he converted to Buddhism, initiating mass conversions of Dalits.
Statement 3: The Reserve Bank of India (RBI), was based on the ideas that Ambedkar presented to the Hilton Young Commission. He, however, did not serve as its Governor.Ambedkar was the first Indian to pursue a doctorate in economics abroad. He argued that industrialisation and agricultural growth could enhance the Indian economy.