Alexei Romanov suffered from hemophilia, a condition that

cause the body to produce too many blood cells due to the bodys inability to form fibrin proteins

prevents blood from clotting normally due to the bodys inability to form fibrin proteins

causes the body to produce abnormally shaped red blood cells due to the bodys inability to form fibrin proteins

prevents the body from absorbing vitamin b12 due to the bodys inability to form fibrin proteins

prevents blood from clotting normally due to the body's inability to form fibrin proteins