How many types of basic units and what are they ?

How many types of basic units and what are they ?
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: Basic unit: A unit of a number which does not depend on any other unit is called a fundamental unit. The basic unit matte is six. Namely- (a) unit of length , ( b) unit of mass , ( c) unit of time , ( d) unit of electric current , ( e) unit of temperature and (f) unit of illumination.
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