Which companion of the Holy Prophet (PBUH) suggested digging a ditch (Khandaq) around Madina to kepep Quresh army at bay ____ ?

A.   Hazrat Abu Usman

B.   Hazrat Salman Farsi

C.   Hazrat Awais Qarni

D.   None of them

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Treaty of Hudaibiya in _____ AH?

A.   6 B.   7 C.   5 D.   4