Quantitative Aptitude Number System Integers

It is given that 5 does not divide n - 1, n and n + 1, where n is a positive integer. Which one of the following is correct ?

1

5 divides (n² + 1)

2

5 divides (n² - 1)

3

5 divides (n² + n)

4

5 divides (n²- n)

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