Assertion (A): Partition of Bengal in 1905 brought to an end the Moderates’ role in the Indian freedom movement. Reason (R): The Surat session of Indian National Congress separated the Extremists from the Moderates.

The correct answer is D because Assertion A is false and Reason R is true.

Assertion A is false because the Partition of Bengal did not end the role of the Moderates. While it led to the rise of Extremist influence and the Swadeshi Movement, the Moderates remained active in the Indian National Congress and even regained full control of the organization after the 1907 split until the Lucknow Pact of 1916. Their influence declined gradually, but it did not end in 1905.

Reason R is true because the Surat session of the Indian National Congress in 1907 did indeed result in a formal split between the Extremists, led by Tilak, and the Moderates, led by Gokhale and Pherozeshah Mehta.

Since the assertion is incorrect and the reason is a factual historical statement, the only valid option is D.