The correct answer is Option 1 "Both A and R are true, and R is the correct explanation of A". The assertion (A) states that the Khilafat movement brought the urban Muslims into the fold of the National Movement, which is an accurate historical fact as this movement had an enormous impact on the integration of Muslim population into the National Movement to fight against the British imperialism. The reason (R), stating that there was a predominant element of anti-imperialism in both the National and Khilafat Movements, properly explains the assertion. This is because the key unifying factor between these two movements was their shared anti-imperialistic standpoint, which brought together diverse factions in the Indian society against the British rule at that time. Therefore, both the assertion and the reason are true, and the reason is the correct explanation of the assertion. Options 2, 3, and 4 are incorrect as they contradict the historical facts regarding the nationalist and anti-imperialist character of both the movements.