The correct answer is Hazrat Zaid bin Haris (RA). He is the only companion of Prophet Muhammad (SAW) whose name is explicitly mentioned in the Holy Quran, specifically in Surah Al-Ahzab (Chapter 33), verse 37. This verse discusses his divorce from Zainab bint Jahsh and her subsequent marriage to the Prophet (SAW), addressing a societal custom of the time.
Hazrat Zaid bin Sabit (RA) was a prominent scribe of the Quran but his name is not mentioned.
Hazrat Usman bin Affan (RA) and Hazrat Hassan bin Ali (RA) are revered companions, but their names are not directly stated in the Quran, though many companions are referred to indirectly.
This unique mention highlights Zaid bin Haris's special status.