(a) The Battle of Bilgram was fought in 1540 between Humayun and Sher Shah Suri. The Battle of Sarnal, Gujarat took place in 1572. The battle of Dharmat was fought between Aurangzeb and Dara Shikoh in 1658. The Battle of Jajau was fought between the Bahadur Shah I and Muhammad Azam Shah in 1707. Hence the correct sequence is given in option (a).