During the 1917 Champaran Satyagraha, Mahatma Gandhi was accompanied and assisted by several local leaders, most notably Dr. Rajendra Prasad and Anugrah Narayan Singh. These associates helped Gandhi gather thousands of testimonies from indigo farmers against the exploitative Tinkathia system. Their participation was crucial in organizing the legal and social framework that led to the success of Gandhi’s first Satyagraha in India. ANSWER: (A) Rajendra Prasad and Anugrah Narayan Singh