Step 1: Understanding the Concept:
Historically, ICAR operated several parallel first-line extension projects (such as National Demonstrations, Operational Research Projects, and the Lab to Land Programme).
To streamline extension delivery and avoid administrative overlap, ICAR decided to integrate all these projects into a single, cohesive institutional framework: the Krishi Vigyan Kendra (KVK).
Step 2: Detailed Explanation:
This major administrative consolidation took effect on 1st April, 1992, marking the beginning of the Eighth Five-Year Plan.
From this date onward, all first-line Transfer of Technology (TOT) activities were centralized under the KVK network in each district, ensuring a unified approach to on-farm testing, frontline demonstrations, and capacity building.
Step 3: Final Answer:
The integration took effect on 1st April, 1992, corresponding to Option (C).