The correct answer is the second one: the Mongols.
In the year 1526, the Turkish-Mongol Empire overthrown the Delhi Sultanate and conquered most of the Indian subcontinent. During the following years the Mughal Empire, as it is known, expanded its borders. It was a strong empire from the 16th century until mid-19th century, when the Mughal government was abolished and the British Raj rule was established in the entire Indian subcontinent.
