The correct option is C Alcohol
Fatty liver syndrome occurs due to excessive intake of alcohol. It is the build-up of fat in liver. Gradually the liver hardens and dries up. The healthy cells of liver are replaced by fibrous tissue. This leads to build up of scar tissue in liver and leads to cirrhosis. Due to this, activities like protein synthesis and glycolysis are greatly reduced in liver. The structure of liver also gets changed and blood flow is blocked.
So, the correct answer is 'd'.