Explanation:
(C) : Given, \(\mathrm{P}(-1,0), \mathrm{Q}(0,0), \mathrm{R}(3,3 \sqrt{3})\)
taking \(\mathrm{Q}(0,0)\) and \(\mathrm{P}(-1,0)\),
\(y-0=\frac{0-0}{0+1}(x+1)\)
\(y=0 \tag{i}\)
Now, taking \(\mathrm{Q}(0,0)\) and \(\mathrm{R}(3,3 \sqrt{3})\),
\(y-3 \sqrt{3}=\frac{3 \sqrt{3}}{3}(x-3)\)
\(y-3 \sqrt{3}=\sqrt{3} x-3 \sqrt{3}\)
\(y=\sqrt{3} x \Rightarrow \sqrt{3} x-y=0\)