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Ratio waves originating from sources S(1...

Ratio waves originating from sources `S_(1)` and `S_(2)` having zero phase difference and common wavelength `lambda` will show completely destructive interference at a point `P` is `S_(1)P-S_(2)P` is

A

`5 lambda`

B

`3 lambda//4`

C

`2lambda`

D

`11lambda//2`

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