Which among the following is not a greenhouse gas?

Aldehydes are produced in the atmosphere by:

Given below are two statements :-
Statement $I :$ The value of the parameter "Biochemical Oxygen Demand $(BOD)$" is important for survival of aquatic life.
Statement $II :$ The optimum value of $BOD$ is $6.5 \ ppm$.
In the light of the above statements,choose the most appropriate answer from the options given below:

The water quality of a pond was analysed and its $BOD$ was found to be $4$. The pond has

The type of pollution that increases during the daytime and in the presence of $O_{3}$ is

Match the particulate pollutants given in List-$I$ with their descriptions given in List-$II$.

List-$I$	List-$II$
$(A)$ Smoke	$(1)$ Formed by condensation of vapours during chemical reactions.
$(B)$ Dust	$(2)$ Fine solid particles.
$(C)$ Mist	$(3)$ Produced by particles of spray liquids and by condensation of vapours.
$(D)$ Fumes	$(4)$ Mixture of solid and liquid particles formed by combustion of organic matter.