Match the following columns:

Column I (Commerical propagation)	Column II (Fruits)
a. Air layering	1. Litchi
b. Sword suckers	2. Banana
c. Patch budding	3. Walnut
d. Seed	4. Papaya

A. a-2, b-3, c-1, 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 D