In the Hydrogen Spectrum,what Is the Wavelength of Light Associated $\times$

Multiple Choice

In the hydrogen spectrum,what is the wavelength of light associated with the n = 3 to n = 1 electron transition?

A) 3.97 F $\times$ 10^-25 nm
B) 8.21 $\times$ 10² nm
C) 9.75 $\times$ 10⁶ cm
D) 1.94 $\times$ 10^-18 m
E) 1.03 $\times$ 10^-7 m