Who among the following invaded India in 1739 ?

After the death of Aurangzeb in 1707, the Mughal Empire entered a period of rapid political decline marked by weak successors, court intrigue, and repeated external invasions that drained Delhi of its wealth and authority. The most devastating of these invasions came from Persia in the mid-18th century.

In 1739, the Persian ruler Nadir Shah marched into northern India, defeated the forces of Mughal emperor Muhammad Shah at the Battle of Karnal, and occupied Delhi. His army plundered the city for weeks, carrying away the Peacock Throne and the Koh-i-Noor diamond, a blow from which Mughal finances and prestige never fully recovered.

Checking the timeline of each named ruler against the year 1739 confirms this uniquely:

• Aurangzeb ruled the Mughal Empire from 1658 to 1707, over three decades before 1739 — a ruler of the empire, not an outside invader in that year.

• Babur invaded India in 1526, defeating the Delhi Sultanate at the First Battle of Panipat to found the Mughal Empire — an entirely different century and a founding campaign, not an 1739 invasion.

• Ibrahim Lodhi was the Delhi Sultanate ruler defeated and killed by Babur in 1526 — he was on the receiving end of an invasion, not the invader of 1739.

Only the 1739 Persian campaign fits the stem, so Nadir Shah is the invader being asked about.