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If pair of tangents are drawn to the ellipse `x^2/16 + y^2/9 = 1` from a point `P` so that the tangents are at right angles to each other, then the possible coordinates of the point `P` is/are (A) `(3sqrt(2), sqrt(7))` (B) `(5, 0)` (C) `(3, 4)` (D) `(2sqrt(5), sqrt(5))`

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