Which of the responses contains all the true statements and no others regarding electromagnetic radiation (light)?
I. As energy increases frequency decreases.
II. As wavelength increases energy decreases.
III. As wavelength increases frequency decreases.
IV. The product of wavelength and frequency is constant.
a) I, III and IV
b) I and II
c) I, II and IV
d) II, III and IV
e) III and IV