Concept:The title 'Frontier Gandhi' was given to a Pashtun independence activist who followed non-violence and was a close associate of Mahatma Gandhi.Explanation:Khan Abdul Ghaffar Khan, also known as Bacha Khan, was a Pashtun leader from the Peshawar Valley. He strongly opposed British rule and later the partition of India. In 1929, he founded the Khudai Khidmatgar movement, which advocated non-violent resistance. His adherence to peace and his friendship with Mahatma Gandhi earned him the nickname 'Frontier Gandhi'. He was born on 6 February 1890. At age 20, he opened a mosque school in his hometown, but the British shut it down due to anti-British activities. His movement faced severe repression, yet he remained committed to non-violence and unity.Answer:C. Abdul Gaffar Khan