Who among the following was popularly known as ‘Frontier Gandhi’?

Abdul Ghaffar Khan

The correct answer is Option (3) → Abdul Ghaffar Khan

Abdul Ghaffar Khan, also known as Bacha Khan, was popularly known as "Frontier Gandhi." He was a prominent political and social leader in British India, particularly known for his nonviolent activism and advocacy for the rights of Pashtuns. Bacha Khan earned the nickname "Frontier Gandhi" due to his close association with Mahatma Gandhi and his adherence to Gandhian principles of nonviolence and peaceful resistance during India's struggle for independence.