The correct answer is b (liver)
The main function of the liver is to filter the blood that arrives from the digestive systems before it can enter other parts of the body. Thus, when people drink alcohol, the liver’s primary responsibility is eliminating ethanol from the bloodstream.
Liver is that organ of the body which helps in the digestion process and removal of toxic substances from the blood. It helps in removal of alcohol particles from the blood stream. As the alcohol reaches the blood and passes down to the liver. The liver starts working on the process of eliminating alcohol from the body. Alcohol dehydrogenase breaks alcohol in to acetaldehyde and this acetaldehyde is further oxidized by dehydrogenase enzyme into acetic acid. This acetic acid produced is further broken down in carbon dioxide and water in the citric acid cycle.