Islamic study

Who preserved the verses and chapters of the Holy Qur’an under the instructions of the Holy Prophet (SAW)?

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(a) Hazrat Zaid bin Sabit (RA)
(b) Hazrat Bilal bin Rubbah (RA)
(c) Hazrat Abu Hurrairah (RA)
(d) Hazrat Ali bin Abu Talib (RA)

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