Question
What is the angle between $(\overrightarrow P + \overrightarrow Q )$ and $(\overrightarrow P \times \overrightarrow Q )$

Answer

b
(b)Vector$(\vec P + \vec Q)$ lies in a plane and vector $(\vec P \times \vec Q)$ is perpendicular to this plane i.e. the angle between given vectors is $\frac{\pi }{2}$.

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