If two lines \( a_{1} x+b_{1} y+c_{1}=0 \) and \( a_{2} x+b_{2} y+c...
If two lines \( a_{1} x+b_{1} y+c_{1}=0 \) and \( a_{2} x+b_{2} y+c_{2}= \) 0 cut the coordinate axes in concyclic points, then
(a) \( a_{1} a_{2}+b_{1} b_{2}=0 \)
(b) \( a_{1} a_{2}-b_{1} b_{2}=0 \)
(c) \( a_{1} b_{1}+a_{2} b_{2}=0 \)
(d) \( a_{1} b_{1}-a_{2} b_{2}=0 \).
\( \mathrm{P} \)
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