The correct answer is option 4, Khan Abdul Gaffar Khan. Khudai Khidmatgars, also known as the Red Shirts, was a nonviolent movement in the North-West Frontier Province (now Khyber Pakhtunkhwa) of British India. They advocated for freedom, social justice, and nonviolence.

Option 1, Hakim Ajmal Khan, was a prominent Indian nationalist and politician who played a significant role in the Khilafat movement. However, he was not the founder of the Khudai Khidmatgars movement.

Option 2, Shaukat Ali, was also a leader of the Khilafat movement and a prominent Indian nationalist. However, he was not the founder of the Khudai Khidmatgars movement.

Option 3, Maulana Abul Kalam Azad, was a prominent Indian scholar, nationalist, and politician. He was associated with the Indian National Congress and advocated for Hindu-Muslim unity. However, he was not the founder of the Khudai Khidmatgars movement.

In conclusion, Khan Abdul Gaffar Khan, also known as Bacha Khan, was the founder of the Khudai Khidmatgars movement. He dedicated his life to