Kilogram is a metric unit of mass.
Answer: Option A
Explanation:
Mass is used to denote the weight of the object hence it is represented in Kilograms. Liters are used to represent the quantity of liquids in weight, pounds are another unit for weight.
Ampere is the SI Unit for current passing through a conductor. Hence Option A is valid and B, C, D are irrelevant. Metric system is used as a common platform for engineers and scientists.
