Correct Answer: Option D

Explanation

\(\hat {n} = \frac{\overrightarrow{p}}{|p|}\)

where \(\hat {n}\) is the unit vector in the direction of p.

\(|p| = \sqrt{4^{2} + 3^{2}} = \sqrt{25} = 5\)

\(\hat {n} = \frac{1}{5} (4i + 3j)\)

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