The Khilafat Movement was a religious and political movement in India that aimed to protect the authority and rights of the Khalifa, the spiritual leader of the Muslims worldwide, who was based in Turkey. The movement received support from both Hindus and Muslims, and it was led by Mahatma Gandhi from the front.

However, despite the initial momentum, the movement eventually lost steam. The correct answer, option 1, explains one of the main reasons for this decline. The office of Khalifa was abolished in Turkey itself, and better terms were offered to the Turkish government. This development weakened the central cause of the movement, as there was no longer a significant threat to the authority of the Khalifa.

Option 2, the opposition of the Muslim League to the Indian National Congress, was not a significant factor in the decline of the Khilafat Movement. While the Muslim League had its own political agenda, it did not have a direct impact on the movement`s momentum.

Option 3, the special concessions given to Muslims by the British government, and option 4, internal frictions between the Congress and the Muslim League, are not directly related to the decline of the Khilafat Movement.

In conclusion, the correct answer states that the abolition of the