Who was considered as last powerful Mughal ruler of India?

Correct option is B

The last powerful Mughal ruler of India was Aurangzeb Alamgir. Aurangzeb ruled the Mughal Empire from 1658 until his death in 1707.
 He was the sixth Mughal emperor and is often considered to be the last powerful emperor of the Mughal dynasty.
 Aurangzeb expanded the empire to its greatest extent and was known for his military conquests and administrative skills. However, his policies of religious intolerance and imposition of Sharia law led to conflicts with other religious groups and weakened the Mughal Empire.