# A small source of sound moves on a circle as shown in figure and an observer is sitting at O. Let v_1,v_2,v_3 be the frequencies heard when the sour

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A small source of sound moves on a circle as shown in figure and an observer is sitting at O. Let v_1,v_2,v_3 be the frequencies heard when the source is at A,B and C respectively.
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A. upsilon_(1) gt upsilon_(2) gt upsilon_(3)
B. upsilon_(1) = upsilon_(2) gt upsilon_(3)
C. upsilon_(2) gt upsilon_(3) gt upsilon_(1)
D. upsilon_(1) gt upsilon_(3) gt upsilon_(2)

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