Ans.
Hemophilia is categorized as a genetic disorder as it can transmits to the offspring from affected parents. Persons affected with hemophilia have low level of blood clotting proteins, such as thrombin. They show unexplained bleeding due to injuries as their blood cells cannot coagulate properly to prevent blood loss. Thus, medications that stimulate blood coagulation will be helpful for persons affected with hemophilia to prevent excess bleeding.
Hence, the correct answer is option 'A). supplement a protein that helps in coagulation.'