While lighting a candle, Pia observed the following changes: i. Wax was melting ii. Candle was burning iii. Size of the candle was reducing iv. Melted wax was getting solidified Of the above changes, that can be reversed are

Question

$\begin{array}{1 1} \text{a. (i) and (ii)} \\ \text{ b. (ii) and (iii)} \\ \text{ c. (iii) and (iv)} \\ \text{ d. (i) and (iv)} \end{array}$