Classifying alcohols by carbon attachment to OH group

Steps:

• Recall that a tertiary alcohol has the OH group attached to a carbon bonded to three other carbons.
• Examine each option's structure for the carbon bearing the OH.
• Count the alkyl groups (carbons) attached to that OH-bearing carbon.
• Identify the option where that count is three.

Why B is correct:

• In B, the carbon with OH is bonded to three alkyl groups, matching the tertiary alcohol definition.

Why the others are wrong:

• A has the OH carbon bonded to one alkyl group (primary alcohol).
• C has the OH carbon bonded to two alkyl groups (secondary alcohol).
• D has the OH carbon bonded to one alkyl group (primary alcohol).

Final answer: B