At the time Hazrat Abu Bakr how many companions had compiled the Quran in the form of a book?

At the time Hazrat Abu Bakr how many companions had compiled the Quran in the form of a book?

حضرت ابوبکرؓ کے زمانے میں کتنے صحابہ نے قرآن مجید کو کتابی شکل میں مرتب کیا؟
Explanation

75 companions had compiled the Qur’an in the form of a book at the Cliphate Hazrat Abu Baker.