If $n$ is an integer, which of the following must be an even integer?

n + 1

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n + 2

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2 n

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2 n + 1

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n^{2}

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Solution

The correct option is C $2 n$
$\Rightarrow$ The number which is multiple of $2$ is called an even number.
$\Rightarrow$ It is given that $n$ is an integer.
$\Rightarrow$ So, $2 n$ will be an even number.

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