Final answer:
Ahmad Shah Durrani's fifth invasion of India occurred in 1761, which led to the significant Battle of Panipat marking the decline of the Maratha Empire. The correct option is c.
Step-by-step explanation:
Ahmad Shah Durrani, also known as Abdali, invaded India multiple times over his reign. The question pertains to the timeline of his invasions, specifically the fifth incursion.
This fifth invasion by Ahmad Shah Durrani took place in the year 1761. It is a historically significant event, as it resulted in the Battle of Panipat, which took place on January 14, 1761.
The battle was a major confrontation between the invading forces of Durrani and the Maratha Empire, marking one of the most pivotal points in the 18th-century Indian history where Durrani's victory led to the decline of the Maratha Empire. The correct option is c.