The organic compound obtained as the end product of the fermentation of sugar solution is :

1. Methanol
2. Ethanol
3. Ethane
4. Methanoic acid

Ethanol

Reason —

$\underset{\text{cane sugar [molasses]}}{\text{C}${12}\text{H}{22}\text{O}{11}} + \text{H}2\text{O} \xrightarrow[\text{[yeast]}]{\text{invertase }} \underset{\text{glucose}}{{\text{C}6\text{H}{12}\text{O}6}} + \underset{\text{fructose}}{{\text{C}6\text{H}{12}\text{O}6}}

$\underset{\text{glucose}}{{\text{C}$6\text{H}{12}\text{O}6}} \xrightarrow[\text{fermentation}]{\text{zymase [yeast]}} \underset{\text{ethanol}}{{2\text{C}2\text{H}{5}\text{OH}}} + 2\text{CO}2