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A second harmonic has to be generated in...

A second harmonic has to be generated in a string of length L stretched between two rigid supports. The point where the string has to be plucked and touched are

A

`(l)/(4), (l)/(2) `

B

`(l)/(4) , (3l)/(4) `

C

`(l)/(2) , (l)/(2) `

D

`(l)/(2) , (3l)/(4)`

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The correct Answer is:
A
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