Explanation

(c)
Liebig’s method is used to estimate carbon and hydrogen.
C and H $\overset{\ \ \ \lbrack O\rbrack\ \ \ \ }{\rightarrow}CO_{2} + H_{2}O$
$\% C = \frac{12}{44} \times \frac{weight\ of\ CO_{2}}{weight\ of\ compound} \times 100$
$\% H = \frac{2}{18} \times \frac{weight\ of\ H_{2}O}{weight\ of\ compound} \times 100$