In the metric system, gram, meter, and liter are basic units.
Hence, the correct option is a) basic.
The metric system measures length, liquid volume, and mass using units like metres, litres, and grams. The metric system is based on 10s and uses multiple units for length, including the kilometre, metre, decimeter, centimetre, and millimetre. This is in addition to the different fundamental units.
The basic unit of length is meter, the basic unit of mass is gram and the basic unit of volume is litre. The metre serves as the fundamental unit of length in the metric system. A metre is just over three feet, or slightly bigger than a yardstick. The gram is the fundamental metric unit of mass. A typical paper clip weighs roughly one gram.
According to experts, one gram is the volume of water needed to fill a cube with a diameter of one centimetre.
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