Let $\vec{u} = 2\hat{i} + 3\hat{j} + \hat{k}$,$\vec{v} = -3\hat{i} + 2\hat{j}$ and $\vec{w} = \hat{i} - \hat{j} + 4\hat{k}$. Then which of the following statements is true?

  • A
    $\vec{u}$ is perpendicular to $\vec{v}$ but not $\vec{w}$
  • B
    $\vec{v}$ is perpendicular to $\vec{w}$ but not $\vec{u}$
  • C
    $\vec{w}$ is perpendicular to $\vec{u}$ but not $\vec{v}$
  • D
    $\vec{u}$ is perpendicular to both $\vec{v}$ and $\vec{w}$

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