The correct answer is (a). The First Battle of Panipat was fought on 15 November 1526, between the invading army of Babur, the first Mughal emperor of India, and the army of Ibrahim Lodi, the last ruler of the Lodi dynasty. The battle took place near the town of Panipat, about 97 km (60 mi) north of Delhi. Babur’s army was much smaller than Ibrahim Lodi’s, but it was better equipped and more disciplined. Babur also had the advantage of superior firepower, as he had brought with him a number of cannons from Central Asia. The battle was a decisive victory for Babur, and it led to the establishment of the Mughal Empire in India.
Option (b) is incorrect because the Battle of Khanwa was fought between Babur and Rana Sanga, the ruler of Mewar, in 1527. Option (c) is incorrect because the Battle of Chausa was fought between Sher Shah Suri and Humayun, the second Mughal emperor, in 1539. Option (d) is incorrect because the Battle of Karnal was fought between Humayun and Akbar, the third Mughal emperor, in 1556.