Correct Answer:
C. Hazrat Jafar (RA)
The question refers to the first migration of Muslims to Abyssinia (modern-day Ethiopia) to escape persecution in Mecca. Hazrat Jafar ibn Abi Talib (RA), a cousin of Prophet Muhammad (SAW) and a prominent companion, led this group. When the Quraish pursued them, Jafar (RA) eloquently presented the tenets of Islam and recited verses from the Quran before King Najashi, successfully defending the Muslim community. Hazrat Ali (RA) remained in Mecca. While Hazrat Usman (RA) was among the emigrants, Jafar (RA) was the primary spokesperson. Hazrat Bilal (RA) was also a companion but not the one who addressed Najashi in this pivotal event.