Physics Vectors Vectors and Scalars

Three vectors A, B and C add up to zero. Find which is false.

1
(A×B) × C is not zero unless B,C are parallel
2
(A × B).C is not zero unless B,C are parallel 
3
If A, B, C define a plane, (A × B) × C is in that plane
4
(A×B).C = |A| |B| |C|→ C2 = A2 + B2

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