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Let A (0,2),B and C be points on parabol...

Let `A (0,2),B` and C be points on parabola `y^(2)+x +4` such that `/_CBA (pi)/(2)`. Then the range of ordinate of C is (a) `(-oo,0)uu (4,oo)` (b) `(-oo,0] uu[4,oo)` (c) `[0,4]` (d) `(-oo,0)uu [4,oo)`

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