What Frequency of Electromagnetic Radiation Has Photons of Energy $4.7 \times 10 ^ { - 25 } \mathrm {~J}$

Multiple Choice

What frequency of electromagnetic radiation has photons of energy $4.7 \times 10 ^ { - 25 } \mathrm {~J}$ ? $( h = 6.626 \times$ 10^-34 $\mathrm { J } \cdot \mathrm { s }$ )

A) $710 \mathrm { MHz }$
B) $4.7 \mathrm { MHz }$
C) $1.4 \mathrm { GHz }$
D) $710 \mathrm { kHz }$