Introduction#!#International system of SI units

Which among the following is the international system of units ?

The SI (international system of units) unit of length is ________

The SI (international system of units) unit of length is ________

Assertion : S.I. units are logical and coherent . Reason : S.I. system of units is a rationalised system.

How many fundamental units are present in the SI system of units ?

Introduction Of R And Its Units