Match the following columns

Column I	Column II
a. Demonstration means	1. Short type demonstration
b. Method demonstration is	2. Showing by doing
c. Result demonstration is	3. Long type demonstration
d. National demonstration is	4. Front line extension project

A. a-2, b-1, c-3, d-4

B. a-3, b-4, c-2, d-1

C. a-4, b-3, c-2, d-1

D. a-1, b-2, c-3, d-4

Answer: Option A