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Q)

Find the scalar components and magnitude of the vector joining the points $P (x_1, y_1, z_1)$ and $Q (x_2, y_2, z_2)$.

$\begin{array}{1 1} \text{(A) The scalar components of PQ are } (x_2-x_1),\:( y_2-y_1)\;and \;( z_2-z_1),\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2} \\ \text{(B) The scalar components of PQ are} (x_1-x_2),\:( y_1-y_2) \;and \;( z_1-z_2),(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2 \\\text{(C) The scalar components of PQ are} x_1\: y_1\; and \;z_1,(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2 \\ \text{(D) The scalar components of PQ are} x_2\: y_2\; and \;z_2,(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2 \end{array}$