The correct option is C Khilafat
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. This movement reflected great level of Hindu-Muslim unity.