Answer: Option [D]Muhammad-Bin-Bakhtiyar Khilji attack Kamrupa on his way to Tibet. Muhammad bin bakthiyar khilji after capturing Bengal decided to invade Kamrupa and Tibet in 1206. With an army consisting of 12000 turkish cavalry, Khilj marched from Devkot( in West Bengal) to invade Assam and Tibet. He converted a local tribal chief to Islam and gave a new name Ali the Mej.