In Islam, the angel who brought Wahi (divine revelation) to Prophet Muhammad (PBUH) was Hazrat Jibbrail (A.S), also known as Gabriel. He is one of the four main archangels and holds a very high status in Islamic belief.

Hazrat Jibbrail (A.S) served as the medium between Allah and the prophets. He is the angel responsible for delivering Allah’s messages to the messengers. He not only brought the Holy Quran to Prophet Muhammad (PBUH) over a period of 23 years, but he also came to many previous prophets with divine instructions.

The first revelation — Surah Al-Alaq’s initial verses — was brought by Hazrat Jibbrail (A.S) in the Cave of Hira. This marked the beginning of Prophethood for Muhammad (PBUH) and the mission of spreading Islam. Throughout his life, whenever a new verse or chapter of the Quran was revealed, it was delivered by Jibbrail (A.S) with perfect accuracy.

His role was not limited to just conveying verses. He also helped explain meanings and gave support to the Prophet (PBUH) during difficult times, especially in battles and moments of hardship.

Each angel in Islam has specific duties:
- Hazrat Mikail (A.S) controls rain and weather.
- Hazrat Israfeel (A.S) will blow the trumpet on the Day of Judgment.
- Hazrat Izraeel (A.S) is the angel of death.
- Hazrat Jibbrail (A.S) is the angel of revelation.

Knowing which angel brought the Wahi is important in understanding the structure of divine communication in Islam and the significance of the Quran’s delivery. It is a common and essential topic in Islamic education and exams.

Therefore, the correct answer is: Hazrat Jibbrail (A.S), the trusted messenger of Allah who delivered His final message to mankind.