(2x - y + z)^2 in the expanded form is :...

`(2x - y + z)^2` in the expanded form is :

A

`4x^2+y^2+z^2+4xy-4yz+2zx`

B

`4x^2+y^2+z^2-4xy-2yz+4zx`

C

`4x^2-y^2-z^2-4xy+4yz-2zx`

D

`4x^2+y^2-z^2+4xy-2yz+2zx`.

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