A) \[\overleftrightarrow{\text{PQ}}\bot \overleftrightarrow{\text{RS}}\]
B) \[\overleftrightarrow{\text{PQ}}||\overleftrightarrow{\text{RS}}\]
C) \[\overleftrightarrow{\text{PQ}}\ne \overleftrightarrow{\text{RS}}\]
D) \[\overleftrightarrow{\text{PQ}}=\overleftrightarrow{\text{RS}}\]
Correct Answer: A
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