What happens when carbon dioxide is passed in lime water?

Question

$\begin{array}{1 1} \text{(a) Lime water turns milky because of formation of calcium carbonate} \\ \text{(b) Lime water turns milky because of formation of water} \\ \text{ (c) Lime water turns red because of formation permanganate} \\ \text{ (d) Lime water turns red because of formation of copper sulphate} \end{array}$