Explanation:

• During the year 1333, Muhammad bin Tughlaq commanded the Qarachil expedition to the KulluKangra region of present-day Himachal Pradesh in India. According to historical accounts from Badauni and Ferishta, Tughluq's initial plan was to cross the Himalayas and launch an attack on China. • Despite his intentions, Muhammad bin Tughlaq encountered opposition from the locals in Himachal. The army of Tughlaq, which was not accustomed to fighting in the hills, was defeated by Prithvi Chand II of the Katoch clan, a Hindu Rajput kingdom of Kangra. As a result, almost all of Tughlaq's troops, which numbered around 100,000, were killed and compelled to withdraw. • Hence option (a) is the correct answer.