The condition for the lines $lx + my + n = 0$ and $l_1x + m_1y + n_1 = 0$ to be conjugate with respect to the circle $x^2 + y^2 = r^2$ is:
- A$r^2(ll_1 + mm_1) = nn_1$
- B$r^2(ll_1 - mm_1) = nn_1$
- C$r^2(ll_1 + mm_1) + nn_1 = 0$
- D$r^2(lm_1 + l_1m) = nn_1$
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View SolutionIf the points $(2,3)$ and $(K,-2)$ are conjugate with respect to the circle $x^2+y^2-2x+4y-2=0$,then $K=$
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