Question

Which of these could be separated by distillation or filtration

Answer 1

Its B- a mixture. 
Because I don't think you could separate and atom by distillation or filtration.
Actually I don't think you could separate an element by them.
I'm pretty sure compound can't be separated by them either. 

Answer 2

Answer: Option (B) is the correct answer.

Explanation:

A process where solute or solid particles which are present in a liquid or gas are separated out with the help of a filter medium like filter paper is known as filtration process.

For example, sand can be separated out from water by using a filter paper.

Components of a mixture can never combine chemically with each other.

Whereas, an element is a substance which contains only one type or kind of atoms.

For example, a pure zinc will contain only atoms of zinc.

A compound is defined as the substance in which different elements are chemically combined together in a fixed ratio by mass.

For example, $MgSO_{4}$ is a compound and elements are present in 1:4 ratio.

A compound can be divided into its constituent or simpler substances.

Thus, we can conclude that a mixture could be separated by distillation or filtration.