pyq/2018/prelims/99

Consider the following:

1. Birds

2. Dust blowing

3. Rain

4. Wind blowing

Which of the above spread plant diseases?

(A) 1 and 3 only

(B) 3 and 4 only

(C) 1, 2 and 4 only

(D) 1, 2, 3 and 4