A) \[2\,[{{(p-r)}^{2}}+{{q}^{2}}]\]
B) \[2\,[{{(p-q)}^{2}}+{{r}^{2}}]\]
C) \[2\,[{{(q-p)}^{2}}+{{r}^{2}}]\]
D) \[2\,[{{(p-q)}^{2}}+{{q}^{2}}]\]
E) None of these
Correct Answer: A
Solution :
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