The correct option is B Chausa
Sher Shah successfully defeated Humayun in the battles of Chausa. At Chausa in 1539 and over 8,000 Mughals troops were killed in the bloody battle. This considerably weakened Humayun's strength, and to add to his miseries, his own brothers were also plotting against him. Sher Shah continued his attacks on the Mughals and drove Humayun to the west.