Final answer:
In Shia Islam, Amir-al-Muminine refers to Imam Ali, who is revered as the first legitimate imam and the direct successor of Prophet Muhammad. The correct answer is c) Imam Ali.
Step-by-step explanation:
In Shia tradition, Amir-al-Muminine is referred to Imam Ali. Imam Ali is considered by Shia Muslims as the first legitimate imam and the rightful successor to the Prophet Muhammad. Ali was the cousin and son-in-law of Muhammad and is recognized for being the first male to accept and follow the message of Islam. Ali's significance in Shia tradition extends to the belief that all legitimate imams must be his descendants, connecting the line of spiritual and temporal authority directly back to Muhammad through Ali and his wife Fatima, Muhammad's daughter. Therefore, among the options provided, the correct answer is c) Imam Ali.