Assertion: The value of van der Waals constant a is larger for ammonia than for nitrogen.
Reason: Hydrogen bonding is present in ammonia.
A. Statement I is true: Statement II is true, Statement II is the correct explanation of Statement I.
B. Statement I is true, Statement II is true, Statement II is not the correct explanation of Statement I.
C. Statement I is true, Statement II is false.
D. Statement I is false, Statement II is true.

Assertion: The value of van der Waals constant a is larger for ammonia than for nitrogen.
Reason: Hydrogen bonding is present in ammonia.
A. If both assertion and reason are correct and reason is correct explanation for assertion
B. If both assertion and reason are correct and reason is not correct explanation for assertion
C. If assertion is correct but reason is incorrect
D. If assertion and reason are both incorreect.