Three organic molecules are given below. The molecular formula of propanoic acid is $\text{CH}_3\text{CH}_2\text{COOH}$. The molecular formula of lactic acid is $\text{CH}_3\text{CH(OH)COOH}$. A glucose molecule contains only $6$ carbon atoms, $6$ oxygen atoms and $12$ hydrogen atoms. Which molecules have the same empirical formula?
- Apropanoic acid, lactic acid and glucose
- Bpropanoic acid and lactic acid only
- Cpropanoic acid and glucose only
- Dlactic acid and glucose only