Explanation:

- As of 2022, the number of public sector banks in India is 12.

- Option 1: 22 - This was closer to the number before various mergers and amalgamations in recent years.

- Option 2: 13 - Incorrect. The number was reduced due to bank mergers.

- Option 3: 12 - Correct. After the mergers in 2019 and 2020, there are 12 public sector banks.

- Option 4: 14 - Incorrect. The number was reduced to 12.

- Option 5: 13 - Repeats a previously incorrect statement.

Option 3: 12 is the correct answer.