Explanation

(d)
In $CH_{3}CH_{2}OH,\$there is intermolecular H-bonding, while it is absent in isomeric ether $CH_{3}OCH_{3}$
Larger heat is required to vaporise $CH_{3}CH_{2}OH$ as compared to$\ CH_{3},OCH_{3}$, thus (a) is incorrect.
$CH_{3}CH_{2}OH$ is less volatile than $CH_{3}OCH_{3},$ thus vapour pressures are different, thus (b) is incorrect.
Boiling point of $CH_{3}CH_{2}OH > CH_{3}OCH_{3}$, thus (c) is incorrect.
$\ \ \ \ \ \ \ \ Density = \frac{mass}{volume},$ due to ideal behaviour at a given temperature and pressure volume and molar mass are same.
Hence, they have same vapour density.