At What Frequency Is the Reactance of A $20.0 - \mathrm { mH }$

Multiple Choice

At what frequency is the reactance of a $20.0 - \mathrm { mH }$ inductor equal to $120 \Omega$ ?

A) $318 \mathrm {~Hz}$
B) $1110 \mathrm {~Hz}$
C) $637 \mathrm {~Hz}$
D) $955 \mathrm {~Hz}$
E) $796 \mathrm {~Hz}$