Match List 1 (Symptoms) with List 2 ( causes) and select the correct pair using the codes given below the lists:

List 1                                                    List 2

A. Khaira disease of rice                       1. Phosphorus deficiency

B. Browing of cauliflower                       2. Molydenum deficiency

C. Purple colouration of Maize leaves   3. Potassium deficiency

D. Firing of tobacco leaves                     4. Zinc deficiency