Assertion :Domain of $f (x)$ is singleton. Reason: Range of $f (x)$ is singleton.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
If the Domain of a function $f (x)$ is singleton set, then it is a continuous function.
If the Range of a function $f (x)$ is singleton set, then it is a constant function.

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