Using rational approximations, what statement is true?

Question

71−−√ > 61−−√
81−−√ > 9
71−−√ < 61−−√
81−−√ < 9

Answer 1

The statement that is true using rational approximations is: 71−−√ > 61−−√

Answer 2

Using rational approximations, what statement is true?
12−−√ < π
16−−√ < 4
16−−√ > 4
12−−√ >π

Answer 3

The statement that is true using rational approximations is: 16−−√ < 4