A. Abu Bakr Siddique (R.A)
B. Salman Al-Farsi (RA)
C. Khalid bin Waleed (R.A)
D. None of these
Explanation:
Salman Farsi RA gave the suggestion of digging the trench around the city of Madinah, these trenches were dug in 6 days. Miracle took place at Jabir RA’s house.