Answer & Explanation
B) Methanol (CH3OH)
Chemical Compounds with stronger intermolecular forces have higher boiling points.
The order of strengths of intermolecular forces is:
London dispersion < dipole-dipole < H-bonding
Methane (CH4) — London dispersion forces
Dimethyl ether (CH3OCH3) — dipole-dipole attractions
Methanol (CH3OH) — hydrogen bonding
Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.