Correct Answer: (a) 2, 1, 3, 4
Solution:The correct chronological order of the given battles is - Battle of Bhatner (1398 - at the time of Timur's invasion), Battle of Khanwa (1527, Between Rana Sanga and Babur), Battle of Sumel-Giri (1544, between Shershah Suri and Rajputs) and Battle of Haldighati (1576, between Akbar and Maharana Pratap).