Assertion:- Boiling point of cis-2-butene is more than trans-2-butene.
Reason:- Dipole moment of cis-2-butene is more than trans-2-butnen.
A. both A and R are true and R is the correct explantion of A
B. both A and R are true and R is not the correct explantion of A
C. A is true but R is false
D. A is false but R is true