Serving%20as%20the%20deputy%20governor%20at%20the%20RBI%2C%20Patel%20headed%20a%20committee%20that%20introduced%20landmark%20changes%20in%20the%20monetary%20policy%20formulation%20of%20the%20central%20bank.%20These%20reforms%20have%20helped%20India%20battle%20inflation%2C%20and%20are%20considered%20to%20be%20among%20the%20most%20important%20reforms%20since%201991.