Multiple choice

Which of the following is a desirable change? a. Turning of milk into curd. b. Formation of manure from animal dung. c. Flooding of a river.

  1. only a

  2. only b

  3. only c

  4. a and b

  5. a and c

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer. Both these changes are desirable.