Critical humidity of a solid salt means the humidity

Question: Critical humidity of a solid salt means the humidity
[A].

above which it will always become damp.

[B].

below which it will always stay dry.

[C].

both (a) and (b).

[D].

above Which it will always become dry and below which it will always stay damp.

Answer: Option C

Explanation:

No answer description available for this question.