The book 'Mahatma Gandhi and Bihar: Some Reminiscences' was written by:

"Mahatma Gandhi and Bihar: Some Reminiscences" was written by Dr Rajendra Prasad, the first President of India, who worked closely with Gandhi in Bihar.

About the book:

• It describes Rajendra Prasad's experiences with Gandhi in Bihar, especially during the satyagraha among the indigo cultivators of Champaran (1917), when Prasad first came into close contact with Gandhi.
• It also describes Gandhi's later visits to Bihar, including his relief work after the great Bihar earthquake of 1934 and his peace mission in 1947.
• Rajendra Prasad also wrote a separate book on the Champaran movement, "Satyagraha in Champaran".

About Dr Rajendra Prasad:

• He was born on 3 December 1884 at Ziradei, in the Siwan district of Bihar.
• He was a brilliant student, who topped the entrance examination of Calcutta University.
• He became a successful lawyer at the Calcutta and Patna High Courts.
• He joined Gandhi in Champaran in 1917, and gave up his legal practice during the Non-Cooperation Movement.
• He was President of the Indian National Congress several times (1934, 1939 and 1947).
• He led relief work after the Bihar earthquake (1934).
• He was the President of the Constituent Assembly (1946-1949).
• He became the first President of India (1950-1962), and is the only President to have served two full terms.
• He was awarded the Bharat Ratna in 1962.
• He was popularly called "Rajendra Babu" and "Deshratna".

His other books:

• "India Divided" (1946), a study of the Hindu-Muslim problem.
• "Atmakatha" (his autobiography, in Hindi).
• "At the Feet of Mahatma Gandhi".
• He died on 28 February 1963 at the Sadaqat Ashram, Patna.

Why not the other options?

Jayaprakash Narayan, Anugrah Narayan Sinha and J. B. Kripalani were other leaders associated with Bihar or Gandhi.