Explanation:

- Option 1: Urjit Patel

Urjit Patel, a former governor of the Reserve Bank of India, was appointed as the Vice-President of the Asian Infrastructure Investment Bank (AIIB) in January 2022.

- Option 2: Raghuram Rajan

Raghuram Rajan served as the governor of RBI from 2013 to 2016. He has since returned to academia and has not been associated with AIIB as Vice-President.

- Option 3: YV Reddy

YV Reddy was the RBI governor before the financial crisis of 2008. He has not been appointed to the AIIB.

- Option 4: D Subbarao

D Subbarao served as RBI governor before Raghuram Rajan. Like Reddy, he has not been associated with the AIIB.