When calculating pure alcohol in a drink, which of the following terms should be used?

The first option is the most appropriate choice for calculating pure alcohol in a drink. By using the formula "Volume x Alcohol concentration," you directly obtain the amount of pure alcohol present in a given drink.

This method leverages the specific volume of the drink and the concentration of alcohol (often expressed as a percentage). For instance, if you have a beverage that is 10% alcohol by volume (ABV) and the total volume is 100 ml, you would calculate pure alcohol by multiplying 100 ml by 0.10 (the decimal equivalent of 10%), resulting in 10 ml of pure alcohol.

The other options do not accurately represent the calculation of pure alcohol. The second option, which involves subtracting non-alcohol volume from the total volume, does not provide a clear or direct method for determining pure alcohol and is not commonly used in alcohol calculations. The third option introduces "standard measure" and "alcohol type," which complicates the calculation without resulting in a straightforward outcome. Finally, the fourth option combines alcohol strength with drink size, which does not yield a clear measure of pure alcohol content.