Correctly match List-I (Agro-climatic zones) with List-II (Percentage of Bihar's Area) and select the correct answer from the lists given below :

List-I	List-II
(Agro-climate zones)	(Percentage of Bihar's area)
a. North and North-Eastern Bihar Plains	1. 29.87%
b. South Bihar Plains	2. 23.71%
c. Chhota Nagpur Plateau	3. 26.14%
d. Chhota Nagpur Hills	4. 20.28%

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

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

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

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

Answer: Option B