A salt is dissolved in water. The pH of this salt solution was found to be 7 by measuring the pH with a universal indicator paper. The salt is most likely to be

Question

$\begin{array}{1 1} (a)\;Na_2CO_3 \\ (b)\;KCl \\ (c)\;NH_4Cl \\ (d) \;CH_3COONa \end{array}$