Assertion (a): Boiling point of alkanes increases with increase in molecular weight.
Reason: Van der Waals forces increase with increase in molecular weight.
Which of the following options is correct?
1) Both assertion (a) and reason (r) are true, and reason (r) is the correct explanation of assertion (a).
2) Both assertion (a) and reason (r) are true, but reason (r) is not the correct explanation of assertion (a).
3) Assertion (a) is true, but reason (r) is false.
4) Assertion (a) is false, but reason (r) is true.
