Concept:The Qur'an was revealed gradually across the whole of Prophet Muhammad's (SAW) prophetic mission, which lasted
23 years.
Explanation:The first revelation came in the Cave of Hira when the Prophet was about
40 years old.
The final revelation came shortly before his death at about
63 years of age.
So, the total period of revelation is
63−40=23 years.
The verses were not sent down at once but stage by stage to answer events and questions among the early Muslims.
During this period, the Prophet's companions memorised each verse, and about
42 scribes recorded the verses on materials such as leather, cloth, bone fragments, and flat stones.
The Prophet himself could neither read nor write, so memorisation and writing were vital for protecting the Qur'an from loss.
Surah Al-Isra (
17:106) says the Qur'an was revealed gradually so the Prophet could recite it to the people at a deliberate pace.
Answer:D.
23 years.