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Ten tuning forks are arranged in increas...

Ten tuning forks are arranged in increasing order of frequency in such a way that any two nearest forks produce `4 beats//s`. The highest frequency is twice that of the lowest . Possible lowest and highest frequencies are

A

80 and 40

B

100 and 50

C

44 and 22

D

72 and 36

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The correct Answer is:
D
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