The angle between the normals of ellipse...

The angle between the normals of ellipse `4x^2 + y^2 = 5`, at the intersection of `2x+y=3` and the ellipse is (A) `tan^(-1) (3/5)` (B) `tan^(-1) (3/4)` (C) `tan^(-1) (4/3)` (D) `tan^(-1) (4/5)`

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sec [tan ^ (- 1) 5 + tan ^ (- 1) ((1) / (5)) - tan ^ (- 1) ((3) / (4))] =