What Is the Frequency of Light (S^{- 1}) That

What is the frequency of light (s^{- 1}) that has a wavelength of 1.23 × 10^{- 6} cm ?

A) 2.44 × 10¹⁶
B) 3.69
C) 9.62 × 10¹²
D) 1.04 × 10^{- 13}
E) 4.10 × 10^{- 17}