The correct option is C Restoration of the sultan of Turkey who was Caliph of the Muslim World
The Khilafat movement was an agitation by Indian Muslims, allied with Indian nationalists, to pressure the British government to preserve the authority of the Ottoman Sultan as Caliph of Islam after World War I. The leaders joined forces with Mahatma Gandhi’s noncooperation movement for Indian freedom, promising nonviolence in return for his support of the Khilafat movement. It had lost its relevance when Mustafa Kemal Ataturk had abolished the Caliphate.