Only 2 is correct.
The Rig Vedic Aryans were pastoral people and their main occupation was cattle rearing. Their wealth was estimated in terms of their cattle. When they permanently settled in North India they began to practice agriculture. With the knowledge and use of iron they were able to clean forests and bring more lands under cultivation.
Trade was another important economic activity and rivers served as important means of transport. Trade was conducted on barter system. In the later times, gold coins called nishka were used as media of exchange in large transactions.

Option c is correct.
The Rashtrakuta Empire was divided into several provinces called rashtras under the control of rashtrapatis.
They were further divided into vishayas or districts governed by vishayapatis.
The next subdivision was bhukti consisting of 50 to 70 villages under the control of bhogapatis.

In the administration of Chandra Gupta Maurya, there was a regular Forest Department administered by the Kupyadhyaksha (Superintendent of Forest Products). His duty was to increase the productivity of forests, to sell trees after fixing their price, classifying strong trees etc.

Option a is correct.
First Anglo-Mysore war – (1766–1769)
First Anglo Maratha war – (1775–1782)
First Anglo Burmese war – (1824–1826)
First Anglo Sikh war – (1845–46)

The Kheda peasant struggle is also known as no-tax peasant struggle. It was a satyagraha launched in March 1919 under the leadership of Gandhiji, Sardar Vallabhbhai Patel, Indulal Yajnik, N.M. Joshi, Shankerlal Pareekh and several others.