$A$ better reagent to oxidize primary alcohols into aldehydes is

Dehydrogenation of $CH_3-CH(OH)-CH_3$ gives

Predict the major product of acid-catalyzed dehydration of butan-$1$-ol.

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Butan$-1-$ol has higher boiling point than ethoxyethane.
Reason $R:$ Extensive hydrogen bonding leads to stronger association of molecules.
In the light of the above statements,choose the correct answer from the options given below:

The product $(B)$ of the reaction sequence is:
$Cl-C_6H_4-CH_2Br$ $\xrightarrow{Mg, Et_2O} A$ $\xrightarrow[2. H_3O^+]{1. CH_3CHO} B$

Which one has the highest boiling point?