What is the maximum distillation proof for whiskey as per the regulations?

The maximum distillation proof for whiskey, according to the regulations set forth by the Alcohol and Tobacco Tax and Trade Bureau (TTB) in the United States, is 160° proof. This designation is crucial because it ensures that the spirit retains its characteristic flavors and compounds while being distilled.

Whiskey cannot be distilled above this proof to maintain its identity and compliance with legal definitions. Distilling at a higher proof would strip the distillate of essential traits unique to whiskey, essential for preserving its quality and flavor profile during production.

The choices that exceed and fall below this standard, such as the other options, either do not conform to the allowed distillation limits for whiskey or represent lower proofs, which are not relevant to the question. Therefore, understanding the legal limits of distillation is key to comprehending whiskey production and classification.