Which of the following statements are correct? (i) Some animals help us in keeping our environment clean. They consume dead animals and dispose them off. They are called scavengers, (ii) Quinine, a forest product obtained from the bark of Cinchona tree, is widely used to treat typhoid. (iii) Van Mahotsava is a festival of cutting down trees. (iv) World Forest Day is celebrated on 21st March every year.

• A. (i) and (iv) only                     
• B. (ii) and (iii) only                      
• C. (i) and (ii) only
• D. (iii) and (iv) only