If $B$ is the reflection of the point $A(1, 2)$ with respect to the line $y = x$ and $(\alpha, \beta)$ is the reflection of $B$ with respect to $y = 0$,then-
- A$\alpha = 1, \beta = -2$
- B$\alpha = 0, \beta = 0$
- C$\alpha = 2, \beta = -1$
- DNone of these
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