The correct answer is (b), Abul Kalam Azad.
Abul Kalam Azad was a freedom fighter, scholar, and educationist who played a major role in the Indian independence movement. He was the President of the Indian National Congress from 1940 to 1946.
When Gandhiji was arrested in Salt Satyagrah, Azad took his place as leader of the movement. He led the movement with great courage and determination, and he was instrumental in its success.
Abbas Tyabji was a lawyer and politician who was one of the founders of the Indian National Congress. He was also the first President of the Congress.
Jawahar Lai Nehru was a freedom fighter, statesman, and the first Prime Minister of India. He was a close associate of Gandhiji, and he played a major role in the Indian independence movement.
Sardar Patel was a freedom fighter, statesman, and the first Deputy Prime Minister of India. He was known as the “Iron Man of India” for his role in uniting the princely states of India into the Indian Union.
All of these men were important figures in the Indian independence movement, but it was Abul Kalam Azad who took Gandhiji’s place as leader of the Salt Satyagrah.