Using the ITU-T channel plan recommendation defined in G.692, if one of the channels has a
frequency of 196.10THz (equivalent to 1528.77nm), then what is the wavelength of the next lower
frequency based on a 50GHz channel plan?

A.
1527.99nm

B.
1528.38nm

C.
1529.16nm

D.
1529.55nm

E.
1529.94nm