In September 2023, Which country has launched its first operational “tactical nuclear attack submarine,” designated Submarine No. 841?

Correct Answer: C. North Korea

In September 2023, North Korea has launched its first operational “tactical nuclear attack submarine” and assigned it to the fleet that patrols the waters between the Korean peninsula and Japan, state media said on Friday.
Submarine No. 841 – named Hero Kim Kun Ok after a North Korean historical figure – will be one of the main “underwater offensive means of the naval force” of North Korea, leader Kim Jong Un said at the launch ceremony on Wednesday.