In 2 Corinthians 12:2, Paul tells of a man in Christ who was caught up to which heaven?

Answer: The third heaven

Paul knew a man in Christ caught up to the third heaven, into Paradise, who heard inexpressible things.

“I know a man in Christ who fourteen years ago was caught up to the third heaven. Whether it was in the body or out of it I do not know, but God knows.”— 2 Corinthians 12:2 (BSB)