Assertion : Soft water lathers with soap but not hard water.
Reason : Hard water reacts with soap to form insoluble salts which form scum, not lather.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.
