The vector projection of $\vec{b}$ on $\vec{a}$ where $\vec{a}=3 \hat{i}+2 \hat{j}+5 \hat{k}$ and $\vec{b}=7 \hat{i}-5 \hat{j}-\hat{k}$ is:

  • A
    $\frac{6(3 \hat{i}+2 \hat{j}+5 \hat{k})}{\sqrt{38}}$
  • B
    $\frac{3(3 \hat{i}+2 \hat{j}+5 \hat{k})}{38}$
  • C
    $\frac{3(3 \hat{i}+2 \hat{j}+5 \hat{k})}{19}$
  • D
    $\frac{3(3 \hat{i}+2 \hat{j}+5 \hat{k})}{\sqrt{38}}$

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