Which one is most stable.

A) primary alcohol.

B) secondary alcohol.

C) teritary alcohal.

C

Explanation:

Tertiary alcohol should be the answer.

This is because tertiary alcohol has a less polar compound which means it is less likely to have chemical reaction with other compounds whereas primary and secondary alcohol has a higher chance of having chemical reaction with other compounds.

I think the answer is A

Explanation:

primary alcohol has only one methyl group bonded to the central carbon atom, and the extent of decrease in partial posative charge is less, making it more prone to attack by nucleophiles. thus tertiary alcohols are more stable than primary alcohols