The image of the point A (1,2) by the li...

The image of the point A (1,2) by the line mirror y=x is the point B and the image of B by the line mirror y=0 is the point `(alpha,beta)`, then a. `alpha=1,beta=-2` b. `alpha =,beta=0` c. `alpha=,beta=-1` d. none of these

A

`alpha=1,beta=-2`

B

`alpha=0,beta=0`

C

`alpha=2,beta=-1`

D

None of these

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The correct Answer is:

C

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