The position vectors of points A,B,C and...

The position vectors of points A,B,C and D are `A=3hati+4hatj+5hatk`,`B=4hai+5hatj+6hatk`,`C=7hati+9hatj+3hatk`, and `D=4hati+6hatj`, then the displacement vectors AB and CD are

Perpendicular

Parallel

Antiparallel

Inclined at an angle of `60^(@)`

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