Which of the following fraction is greater than 1?

Here,

we know, proper fractions are less than 1 and improper fractions are greater than 1.

$\frac{4}{6}$, the denominator is greater than its numerator, so it is a proper fraction.

$\frac{9}{7}$, the denominator is less than its numerator, so it is an improper fraction.

$\frac{8}{11}$, the denominator is greater than its numerator, so it is a proper fraction.

$\frac{9}{12}$, the denominator is greater than its numerator, so it is a proper fraction.

Therefore, only $\frac{9}{7}$ is improper fraction and hence greater than 1.