Correct Answer:
C. Hazrat Zubair RA
Explanation:
The Sahabi known as Hawari e Rasool (the disciple or loyal helper of the Messenger) is Hazrat Zubayr ibn al-Awwam (RA).
Prophet Muhammad (PBUH) bestowed this title upon him during the Battle of the Trench (Ghazwah al-Khandaq) after he courageously volunteered to scout the enemy multiple times.
The Prophet (PBUH) stated: Every Prophet has a Hawari (disciple), and my Hawari is Az-Zubayr ibn al-Awwam.
Hazrat Zubayr (RA) holds a highly esteemed place in Islamic history as one of the Ashara Mubashara. He was also the cousin of the Prophet (PBUH) and the husband of Hazrat Asma bint Abi Bakr (RA).