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The figure shows four progressive wave A...

The figure shows four progressive wave A,B,C & D. It can be concluded from the figure that with respect to wave A

A

the wave C is ahead by a phase angle of `pi//2` & the wave B lags behind by a phase angle `pi//2`

B

the wave C lags behind by a phase alngle of `pi//2` & the wave B is ahead by a phase angle of `pi//2`

C

the wave C is ahead by a phase angle of `pi` & the wave B lags behind by the phase angle of `pi`

D

the wave C lags behind by a phae angle of `pi` & the wave B is ahead by a phase angle of `pi`

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The correct Answer is:
B
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