The position vectors of points \( A, B, C \) and \( D \) are P \[ \begin{array}{l} A=3 \hat{i}+4...
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0The position vectors of points \( A, B, C \) and \( D \) are
P
\[
\begin{array}{l}
A=3 \hat{i}+4 \hat{j}+5 \hat{k}, B=4 \hat{i}+5 \hat{j}+6 \hat{k}, \\
\vec{C}=9 \hat{i}+11 \hat{j}+5 \hat{k} \text { and } D=4 \hat{i}+6 \hat{j},
\end{array}
\]
W
then the displacement vectors \( A B \) and \( C D \) are
(A) Perpendicular
(B) Parallel
(C) Antiparallel
(D) Inclined at an angle of \( 60^{\circ} \)
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