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Orthogonal Vectors

LINALG-WJ4L2Z

Which of the following vectors is orthogonal to $\mathbf{v} = (1,2,-1,0)$?

A

$\mathbf{w}_1 =(2,1, 3,1)$

B

$\mathbf{w}_2 =(0,0,0)$

C

$\mathbf{w}_3 =(1,1,1,1)$

D

$\mathbf{w}_4 =(-2,1,0,1)$

E

$\mathbf{w}_5 =(0,1,0,1)$