Area of a rectangle having vertices A, B, C and D with position vec...

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Area of a rectangle having vertices A, B, C and D with position vectors
\( \mathrm{P} \) \( -\hat{i}+\frac{1}{2} \hat{j}+4 \hat{k}, \hat{i}+\frac{1}{2} \hat{j}+4 \hat{k}, \hat{i}-\frac{1}{2} \hat{j}+4 \hat{k} \) and \( -\hat{i}-\frac{1}{2} \hat{j}+4 \hat{k} \), respectively is

W.
(A) \( \frac{1}{2} \)
(B) 1
(C) 2
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