
While Patel himself has said that he resigned due to personal reasons, many suspect the growing rift between the RBI and the Centre to be the cause.
Notably, the last official resignation of an RBI Governor took place in 1957.
Here's more.
The only two RBI Governors to officially resign
The first RBI Governor to officially resign was Sir Osborne Smith, who quit his post in 1937 owing differences with the government over policy issues.
The second official resignation came in 1957, when Sir Benegal Rama Rau resigned owing to a Nehru-backed attack on RBI's autonomy.