Step 1: Proposal for a Constituent Assembly.
In 1934, M. N. Roy, a revolutionary and political thinker, initially proposed the concept of a constituent assembly for framing the Indian Constitution. He championed the creation of a constituent assembly, elected by the Indian populace, to formulate a democratic constitution.
Step 2: Option Evaluation.
- (1) M. N. Roy: Correct. M. N. Roy first proposed the constituent assembly in 1934, which materialized in 1946.
- (2) Jawahar Lal Nehru: Incorrect. While a key figure in Indian independence, Nehru did not propose the assembly in 1934; his involvement occurred later.
- (3) B. R. Ambedkar: Incorrect. Although instrumental in drafting the Constitution, Ambedkar did not propose the constituent assembly.
- (4) Khan Abdul Gaffar Khan: Incorrect. Despite his significance in the independence movement, Khan Abdul Gaffar Khan did not propose the assembly.
Step 3: Conclusion.
The correct choice is (1) M. N. Roy.