Which Companion from Persia became a close confidant of the Prophet and is credited with advising the trench strategy?
Q1. Which Companion from Persia became a close confidant of the Prophet and is credited with advising the trench strategy?
Answer: Salman al-Farsi
Explanation: Salman al-Farsi, a Persian companion who had traveled extensively seeking truth, proposed digging a trench around Madinah — a Persian military strategy unknown to the Arabs — before the Battle of Khandaq.