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Two curves C1: y=x^2-3\ a n d\ C2\ : y\ ...

Two curves `C_1: y=x^2-3\ a n d\ C_2\ : y\ k x^2\ ,\ k in R` intersect each other at two different points. The tangent drawn to `C_2` at one of the points of intersection `A\ -=` `(a , y_1),(a >0)` meets `C_1` again at `B\ (1, y_2)\ (y_1!=y_2)dot` The value of `' a '` is 1 (b) 3 (c) 5 (d) 7

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