Amines are less reactive in substitution reactions. Their reactivity is much lesser than alcohols and alkylflourides towards substitution. Protonation

Amines are less reactive in substitution reactions. Their reactivity is much lesser than alcohols and alkylflourides towards substitution. Protonation of the amino group makes it a better leaving group, but not nearly as good a leaving group as a protonated alcohol. Protonated amino groups cannot be displaced by `OH^(-)` because it would react immediately with the acidic hydrogen which would convert it in to a poor nucleophile. The leaving group in quarternary ammonium ion has about the same leaving tendency as a protonated amino group but does not have acidic hydrogen. the reaction of a quarternary ammonium ion with hydroxide ion is known as Hoffmann elimination reaction. The leaving group is tertiary amine. Since a tertiary amine is only a moderately good leaving group, the reaction requires heat. The carbon to hwich the tertiary amine is attached is designated as `alpha` carbon. When the hydroxide ion starts to remove a `beta` H form from a quarternary ammonium ion, the leaving group does not immediately start to leave because a tertiary amine is not a good leaving group. As a result, a partial negative charge bulds up on the carbon from which the proton is removed.
Which of the following statements is correct?
A. `PK_(a)` value of protonated amine is more than that of protonated alcohol
B. `PK_(a)` valued of the protoned amine is less than that of protonated alcohol
C. `PK_(a)` value of protonated amine is equals to that of protonated alcohol
D. `PK_(a)` value of amine is less than that of alcohol