Which of the Following Frequencies Corresponds to Light with the Longest

Multiple Choice

Which of the following frequencies corresponds to light with the longest wavelength?

A) 3.00 $\times$ 10¹³ s^-1
B) 4.12 $\times$ 10⁵ s^-1
C) 8.50 $\times$ 10²⁰ s^-1
D) 9.12 $\times$ 10¹² s^-1
E) 3.20 $\times$ 10⁹ s^-1