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A B C are the points on x, y and z axes ...

A B C are the points on x, y and z axes respectively in a three dimensional co-ordinate system with O as origin. Suppose the area of triangles OAB, OBC and OCA are 4, 12 and 6 respectively, then the area of the triangle ABC equals (A) 16 (B) 14 (C) 28 (D) 32

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