Answer: Option (A) is the correct answer.
Explanation:
When granular solids are separated out according to their size then this process of separation is known as screening.
So, when a solid substance dissolves in a liquid then its molecules will dissociate into ions. Therefore, its particles cannot be separated out by screening.
Therefore, when solid particles are suspended in a gas then they can be separated out easily through the process of screening.
Thus, we can conclude that in a situation where the mixture is a solid suspended in a gas then screening be used to separate a mixture.
