The unit vector along \( 2 \mathrm{i}-3 \mathrm{j}+\mathrm{k} \) is (a) \( \frac{2 \mathrm{i}-3 ...

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The unit vector along \( 2 \mathrm{i}-3 \mathrm{j}+\mathrm{k} \) is
(a) \( \frac{2 \mathrm{i}-3 \mathrm{j}+\mathrm{k}}{\sqrt{14}} \)
(b) \( \frac{2 \mathrm{i}-3 \mathrm{j}+\mathrm{k}}{5} \)
(c) \( \frac{2 \mathrm{i}-3 \mathrm{j}+\mathrm{k}}{\sqrt{15}} \)
(d) None of these
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