Explanation:

- As of October 2019, India had a total of 22 operational nuclear reactors.

- However, these reactors were spread across 7 nuclear power plants.

- Option:1 - 11 nuclear power plants: This is incorrect since India did not have 11 separate nuclear power plants at the time.

- Option:2 - 7 nuclear power plants: This is the correct option; the reactors were distributed among 7 nuclear power plants.

- Option:3 - 9 nuclear power plants: This is not correct; India had fewer than 9 plants.

- Option:4 - 5 nuclear power plants: This is incorrect; more than 5 plants were present.