Match List-I with List-II and select the correct answer:

List-I (Acid)	List-II (Source)
a. Lactic acid	1. Tamarind
b. Tartaric acid	2. Orange
c. Oxalic acid	3. Tomato
d. Citric acid	4. Sour curd

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

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

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

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

Answer: Option D