Hexane 1,6 diol on heating with dilute alkali undergoes intra molecular aldol condensation. The final product obtained is

Given, Hexane
When heated with diluted alkali, hexane 1,6 diol experiences intramolecular aldol condensation. The resultant product is

A mixture of hydrocarbons with six carbon atoms known as "hexane" or "hexanes" is used in industry and commerce, and it includes n-hexane, its isomers 2-methylpentane and 3-methylpentane, as well as trace amounts of other hydrocarbons.

The major product will always be the one with a conjugated double bond. This gives the system stability based on resonance. A ring with five members will develop. Only neutralising the acidic mixture will produce a product with a -OH group. If you add too much acid, the final product will have a double bond rather than a -OH group.

Consequently, the right response is B.