Commercial sources of energy are :

(A) Animal waste

(B) Coal

(C) Dried husk

(D) Petroleum

(E) Electricity

Choose the correct answer from the options given below :

(B), (D) and (E) Only

The correct answer is option (3) : (B), (D) and (E) Only

Sources of Energy: There are commercial and non-commercial sources of energy. Commercial sources are coal, petroleum and electricity as they are bought and sold. Non-commercial sources of energy are firewood, agricultural waste and dried dung. These are noncommercial as they are found in nature/forests.

****** from Old NCERT Book : Infrastructure