The correct answer to the question is option 3, 1526. The 1st Battle of Panipat, a significant battle in Indian history, took place in 1526. This battle was fought between the forces of the first Mughal Emperor Babur and the Ibrahim Lodi, the last Sultan of the Delhi Sultanate. It resulted in a decisive victory for Babur and marked the establishment of the Mughal Empire in India. The battle was fought near Panipat, a city in present-day Haryana, India. It is important to note that the other options mentioned are not correct. Option 1, 1761, is incorrect as it is significantly later in history and does not correspond to the first battle. Option 2, 1516, and option 4, 1556, are also incorrect as they do not align with the correct year, which is 1526.