A) \[\hat{P}=\hat{Q}\]
B) \[|\,\vec{P}\,|\,=\,|\,\vec{Q}\,|\]
C) \[P\hat{Q}=Q\hat{P}\]
D) \[\vec{P}+\vec{Q}=\hat{P}+\hat{Q}\]
Correct Answer: D
Solution :
\[\vec{P}+\vec{Q}=P\hat{P}+Q\hat{Q}\]
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