A) \[OP=OQ\]
B) \[OP\,\bot \,OQ\]
C) \[OP||OQ\]
D) None of these
Correct Answer: B
Solution :
\[{{a}_{1}}{{a}_{2}}+{{b}_{1}}{{b}_{2}}+{{c}_{1}}{{c}_{2}}=0,\] so \[OP\bot \,OQ\].
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