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.

1. The question presents an Assertion (A) and a Reason (R) concerning the Partition of Bengal and the role of Moderates and Extremists. 2. Assertion (A): States that the Partition of Bengal in 1905 brought to an end the Moderates' role in the Indian freedom movement. This is false. While the Partition and the subsequent Swadeshi movement led to the rise of Extremists and diminished the dominance of Moderates, the Moderates continued to play a role in the Indian National Congress and the freedom movement, albeit less prominently. 3. Reason (R): States that the Surat session of Indian National Congress separated the Extremists from the Moderates. This is true. The Surat Split occurred in 1907 due to ideological differences and disagreements over strategy between the two factions. 4. Connection: Since Assertion (A) is false, we don't need to evaluate the explanatory link. 5. Therefore, A is false, but R is true. 6. This corresponds to option (D).