The boiling point of alcohol are _________ than corresponding thiols.
Correct option is A. More
In alcohol, hydrogen bonding is present between oxygen and a hydrogen atom. Sulfur is less electronegative than oxygen and hence, forms a weaker hydrogen bond than in alcohol.
Stronger the hydrogen bonding, higher is the boiling point.
Hence, the boiling point of alcohol is more than the corresponding thiol.
Hence, option $$A$$ is correct.