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For a particular tube, among six harmoni...

For a particular tube, among six harmonic frequencies below 1000 Hz, only four harmonic frequencies are given: 300 Hz, 600 Hz, 750 Hz and 900 Hz. What are the two other frequencies missing from this list?

A

100 Hz, 150 Hz

B

150 Hz, 450 Hz

C

450 Hz, 700 Hz

D

700 Hz, 800 Hz

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The correct Answer is:
B
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