Step 1: Understanding the Concept:
Extension education is an out-of-school educational system designed to bring about desirable changes in the behavior of people.
Step 2: Detailed Explanation:
Extension education is classified as an applied behavioural science.
It applies psychological and sociological principles to bring about three core behavioral changes in rural farmers:
1. Changes in Knowledge (what they know).
2. Changes in Attitude (how they feel about innovations).
3. Changes in Skills (how they perform tasks).
Step 3: Final Answer:
Extension education is an applied behavioural science, which is option (C).