Explanation

A is correct because Hazrat Ibn Abbas (RA) was known for his deep knowledge of the Quran and was given this title. B is incorrect because Khair-ul-Bashr is a general honorific not specifically attributed to him in this context. C is incorrect because Ameen-ul-Ummat is generally associated with other prominent figures. D is incorrect because Sayyed-ul-Muslimeen is another title that does not fit his specific renown.