question_answer

There are two heaps of garbage. Heap A contains peels of fruits and vegetables, egg shells, tea leaves, food wastes, etc. Heap B contains polythene bags, aluminium foils, old shoes and broken glassware. Heap A and Heap B are buried separately indifferent pots and these pots are then covered with soil. After few days the soil is removed. Which of the two heaps will appear black in colour and why?

A) Heap A, in it the waste materials have rotten completely

B) Heap B, in it the waste materials have rotten only partly.

C) Both, in both the waste materials have rotten completely

D) Neither A nor B, the waste materials in both of them have rotten only partly.