The answer to this is D. Green.
the relation that relates the speed of wave, frequency of wave and wavelength is given as
wavelength = 
the speed of wave in a medium remains constant. hence the wavelength is inversely related to the frequency of wave.
that means, as the frequency is increased, the wavelength decreases and vice versa.
hence the correct choice is
B decreases
Answer:
option (B) is the correct option.
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Well the similarity is that even though they are in a different state of matter they still come from the same substance: h2o