Assertion : Water expands both when heated or cooled from `4^(@)C`
Reason : Density of water is minimum at `4^(@)C`.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If the 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.

Answer

C

Explanation

At `4^(@)C` the volume of water minimum. When it is cooled below `4^(@)C` or heated above`4^(@)C`, then it expands or its volume increases. As volume at `4^(@)C` is minimum thus its density `(=("mass")/("volume"))` will be maximum.