Who was known as Frontier Gandhi?

Khan Abdul Gaffar Khan

The correct answer is option (3) - Khan Abdul Gaffar Khan

Not all Muslim-majority regions expressed a desire to be a part of Pakistan. Khan Abdul Ghaffar Khan, widely known as the 'Frontier Gandhi', strongly opposed the concept of a separate nation based on religious lines. He was the undisputed leader of the North Western Frontier Province and staunchly opposed to the two-nation theory.