Methyl orange is

Question

$\begin{array}{1 1} \text{(a) Pink in acidic medium, yellow in basic medium} \\ \text{ (b) Yellow in acidic medium, pink in basic medium} \\ \text{ (c) Colourless in acidic medium, pink in basic medium} \\ \text{ (d) Pink in acidic medium, colourless in basic medium.} \end{array}$