When the pressure of the gas in a discharge tube is gradually lowered. I. there is a violet glow in the tube II. the glow in the tube splits into bands which get further apart. III, the glow and the bands eventually disappear and there is a green fluorescence in the tube. IV. the tube breaks into pieces. Which of the following are correct?
A.
I and II only
B.
I and III only
C.
I and IV only
D.
I, II and III only
E.
I, II III and IV
Correct Answer: Option B
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