What Is the Difference in Frequency for Spectral Lines Emitted

Multiple Choice

What is the difference in frequency for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097*107 m-1.)

A) 5.65 *10-13 Hz
B) 31 Hz
C) 1.77 * 1012 Hz
D) 2.55 * 1016 Hz
E) 1.02 * 1017 Hz