Who was the Head of that board, which was established for the preparation of copies of Musaef Abi Bakr?

• A. Hazrat Zaid bin Sabit (R.A)
• B. Hazrat Usama bin Qais (R.A)
• C. Hazrat Usman bin Maznoun (R.A)
• D. Hazrat Muaz bin Jabel (R.A)