The pilgrimage of the tenth year of Hijrah was called Haijul, Wada because it
attracted an exceptionally large congregation
was led by the first of the orthodox caliphs
was the last one performed by the prophet (SAW)
Bought about the final revelation of the Qur'an
Correct answer is C
The Farewell Pilgrimag irefers to the one Hajj pilgrimage that Muhammad performed in the Islamic year 10 AH, following the Conquest of Mecca.