At the time Abu Bakr (Radhiallahu Anhu) how many companions had compiled the Qur’an in the form of a book...? Mcqs

At the time Abu Bakr (Radhiallahu Anhu) how many companions had compiled the Qur’an in the form of a book...?

(A) 5

(B) 65

(C) 75

(D) 85