Q. Which of the following activities can be considered as a Waste to Wealth generating activity?
a.Utilizing Fly Ash produced through the combustion for making bricks.
b.Converting used cooking oil into an alternative fuel.
c.Converting organic food waste into biogas.
Select the correct answer using the codes given below;

[A] 1 only

[B] 2 and 3 only

[C] .1 and 3 only

[D] .1, 2 and 3

Answer: D

Source: PIB