Which of the following represents the correct units for measuring small amounts of LPG?

Liters or pints are appropriate units for measuring small amounts of Liquefied Petroleum Gas (LPG) because both of them provide sufficient precision for such measurements.

Liters are a commonly used metric unit, widely accepted in various industries for liquid measurements, including gases in liquid form like LPG. For practical applications, particularly in countries using the metric system, liters are often preferred for their convenience in calculations and conversions.

Pints, on the other hand, are a unit from the imperial system, and while they are less common for gas measurements, they still can be used for small volumes. The combination of liters and pints allows for flexibility in usage, depending on regional preferences or operational needs.

The other units mentioned, while useful in specific contexts, are less suitable for measuring the small amounts typically associated with LPG. Ounces or quarts, for example, might be too imprecise on a larger scale, and cubic meters or gallons are more suitable for larger quantities and not for smaller measurements typically required in practical scenarios involving LPG.