The correct answer is D. Jayaprakash Narayan.
Champaran Satyagraha was a major nonviolent protest against the British indigo plantation system in the Champaran district of Bihar, India, led by Mahatma Gandhi in 1917. The protest was successful in getting the British government to abolish the system.
Dr Rajendra Prasad, Anugrah Narayan Singh, and J. B. Kripalani were all involved in the Champaran Satyagraha. Dr Rajendra Prasad was one of the main leaders of the protest. Anugrah Narayan Singh was a local leader who helped Gandhi to organize the protest. J. B. Kripalani was a lawyer who provided legal assistance to the protesters.
Jayaprakash Narayan was not involved in the Champaran Satyagraha. He was born in 1902, after the protest had taken place. He was a prominent Indian independence activist and politician who played a leading role in the Quit India Movement of 1942. He was also the first President of the Janata Party.