Which among the following show tautomerism?

• (A) Alcohols
• (B) Phenols
• (C) Ethers
• (D) Anisole

Tautomerism is a special type of isomerism where compounds can readily interconvert between two forms, typically involving the relocation of a hydrogen atom and a shift in double bonds. Among the options provided, the one that exhibits tautomerism is:

Phenols

Phenols can undergo tautomerism, particularly in the presence of a strong base or acid, leading to the formation of their corresponding quinone structures. The other compounds listed, such as alcohols, ethers, and anisole, do not typically show this behavior.

Summary of Options

• Alcohols: Generally do not show tautomerism.
• Phenols: Can exhibit tautomerism.
• Ethers: Do not show tautomerism.
• Anisole: Does not exhibit tautomerism.

Thus, the correct answer is (B) Phenols.