Can the terms pollution and pollutant be used interchangeably?

to put it simply, no. no they cannot.

Explanation:

the reason being pollution means the result of pollutants in the environments, and pollutants are known as the CAUSE of pollution. 2 very different terms.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.