Which among the following operation/s has/have 0 as an identity element?

Multiplication

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Addition

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Subtraction

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(b) and (c) above.

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Solution

The correct option is D (b) and (c) above.
Identity element is that when combined with another number in a particular operation leaves that number unchanged. For any integer a, $a \pm 0 = 0 \pm a = a$ . Hence, 0 is the identity element for addition and subtraction.

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