Assertion: In the pressure-temperature phase diagram of water, the slope of the melting curve is found to be negative.

• A. Reason: Ice contracts on melting to water.
• B. Both assertion and reason are true and the reason is the correct explanation of the assertion
• C. Both assertion and reason are true but the reason is not a correct explanation of the assertion
• D. Assertion it true but the reason is false
• E. Both assertion and reason are false