Step 1: Contextualizing the policy.
In the post-independence era, farmers often suffered at the hands of private traders who manipulated weights and prices. To fix this, the government introduced "Regulated Markets" (APMCs). Thus, (A) is true.
Step 2: Analyzing the benefits.
Regulated markets involve oversight committees that ensure auctions are fair, weights are accurate, and farmers receive immediate payment. This directly eliminates the malpractices of middlemen. Thus, (R) is true.
Step 3: Determining the link.
The very reason the government decided to regulate these markets was to provide the protections mentioned in (R). Therefore, (R) is the logical "why" behind the "what" in (A).
Final Answer: Both Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).