(A ) The boiling point of ethanol is much higher than that of diethyl ether.
(R ) In ethanol, the molecules are associated due to inter-molecular hydrogen bonding, whereas in diethyl ether it is not possible.
A. If both (A) and (R ) are correct and (R ) is correct explanation of (A ).
B. If both (A ) and (R ) are correct but (R ) is not correct explanation of (A ).
C. If (A) is correct but (R ) is incorrect
D. If (A) is incorrect but (R ) is correct.