$A$ vector in the direction of $v = 2\hat{i} + 3\hat{j} + \hat{k}$ with magnitude $\sqrt{7}$ is

  • A
    $\frac{2}{\sqrt{3}}\hat{i} + \frac{3}{\sqrt{3}}\hat{j} + \frac{1}{\sqrt{3}}\hat{k}$
  • B
    $\hat{i} + \frac{3}{2}\hat{j} + \frac{1}{2}\hat{k}$
  • C
    $\frac{2}{\sqrt{2}}\hat{i} + \frac{3}{\sqrt{2}}\hat{j} + \frac{1}{\sqrt{2}}\hat{k}$
  • D
    $\frac{2\sqrt{7}}{\sqrt{14}}\hat{i} + \frac{3\sqrt{7}}{\sqrt{14}}\hat{j} + \frac{\sqrt{7}}{\sqrt{14}}\hat{k}$

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