If ' $n$ ' is a negative integer, which of the following must be a positive integer?

n + 2

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2 n

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n^{2} - 5

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n^{2} + 1

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Solution

The correct option is D $n^{2} + 1$
if $n$ is negative number
$n^{2}$ is positive irrespective of the magnitude.
When $+ 1$ is added to a positive number, it will remain positive.
Hence, Option D is correct.

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