Answer: Option (b) is the correct answer.
Explanation:
Plasma is defined as the hot ionized gas that consists of positively charged ions and negatively charged electrons.
Since, it is a hot gas therefore, its particles move much more rapidly from one place to another.
For example, neon is a plasma.
Whereas in solid substances only, particles are arranged in a fixed lattice because in solid state they are held together by strong forces of interaction. As a result, particles are not able to move from their position.
For example, crayon is a solid substance hence, it has a fixed lattice.
Thus, we can conclude that State X = neon; State Y = crayon.
