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? (R_H = 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