Which Persian companion suggested digging a trench to defend Madinah during the Battle of the Trench?
ASuhaib ar-Rumi (RA)
BSalman al-Farsi (RA)
CBilal (RA)
DZaid ibn Harithah (RA)
Explanation
Salman al-Farsi (RA) introduced this Persian military tactic, which was unfamiliar to the Arabs but proved highly effective in defending the city.

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