What was the relationship between Ali ibn Abi Talib (RA) and Prophet Muhammad (PBUH), besi

A) His father-in-law

B) His brother-in-law

C) His son-in-law

D) His foster brother

Explanation

Ali ibn Abi Talib (RA) was the son-in-law of Prophet Muhammad (PBUH), having married his youngest daughter, Fatimah (RA).