Explanation:

All the statements are correct. 

Tinkathia was the system under which the native peasants of Champaran (Bihar) were forced to cultivate three kathaa Indigo out of every 20 kathaa (Bigha) of land. A Bigha is a popular land holding in Bihar and it is little less than an Acre.The first Satyagraha movements inspired by Mahatma Gandhi occurred in Champaran district of Bihar in the year 1917. The Champaran Satyagraha was the first to be started, but the word Satyagraha was used for the first time in Anti Rowlatt Act agitation. Champaran,  a district in the state of Bihar where tens of thousands of landless serfs, indentured labourers and poor farmers were forced to grow indigo and other cash crops instead of the food crops which were necessary for their survival. These goods were bought from the farmers at a very low price. Suppressed by the brutal militias of the landlords, they were given negligible compensation, leaving them in extreme poverty. Even in the throes of a devastating famine, the British government levied a heavy tax on them and insisted on increasing the rate. Without food and money, the situation was growing progressively unbearable and the peasants in Champaran revolted against the government in indigo plant cultivation in 1914 (at Pipra) and in 1916 at (Turkaulia). Raj Kumar Shukla who was an indigo cultivator persuaded Mahatma Gandhi to go to Champaran and hence, the Champaran Satyagraha began. Gandhiji arrived in Champaran on 10 April 1917 with a team of eminent lawyers i.e.Brajkishore Prasad, Rajendra Prasad, Anugrah Narayan Sinha and  Acharya Kripalani.