Question

Choose the correct option from given alternative:
Incomplete combustion of coal and petroleum :
(A) increases air pollution.
(B) increases the efficiency of machines.
(C) reduces global warming.
(D) produce poisonous gases.

विकल्प

• (A) and (B)

• (A) and (D)

• (B) and (C)

• (C) and (D)

Answer 1

Incomplete combustion of coal and petroleum increases air pollution and produce poisonous gases.

Hence, the correct answer is option (A) and (D).