Types of binary relationships in DBMS

Describe briefly three types of binary relationships in DBMS?

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The three types of binary relationships which are used in DBMS are as follows:

a) 1: 1 - a single entity instance of one kind is linked to a single-entity instance of any other type.
b) 1 : N - a single entity instance of one kind is linked to many-entity instances of another type.
c) M : N - many-entity instances of one kind is linked to many-entity instances of another type.

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