If the equations x^(2) -px +q=0 and x^(2...

If the equations `x^(2) -px +q=0` and `x^(2)+qx-p=0` have a common root, then which one of the following is correct?

A

`p-q=0`

B

`p+q-2=0`

C

`p+q-1=0`

D

`p-q-1=0`

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