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If (2x-y)^(2)+(3y-z)^(2)=0 then x:y:z is...

If `(2x-y)^(2)+(3y-z)^(2)=0` then `x:y:z` is

A

`1:2:6`

B

`2:1:3`

C

`2:3:1`

D

`1:2:3`

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