Which two of Pharaoh's officials were put in the prison where Joseph was confined?

Answer: The cupbearer and the baker

Pharaoh was angry with his chief cupbearer (KJV: "butler") and chief baker and imprisoned them where Joseph was held.

“Some time later, the king’s cupbearer and baker offended their master, the king of Egypt. Pharaoh was angry with his two officers, the chief cupbearer and the chief baker, and imprisoned them in the house of the captain of the guard, the same prison where Joseph was confined.”— Genesis 40:1-3 (BSB)