Test Academy | The points A (1, 1, 0), B(0, 1, 1), C(1, 0, 1) and D(2/3, 2/3, 2/3) Coplanar, Non-coplanar, Vertices of a parallelogram, None of these

Question

The points A (1, 1, 0), B(0, 1, 1), C(1, 0, 1) and D(2/3, 2/3, 2/3)

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