Beta thalassemia major is often referred to as which of the following?

Beta thalassemia major is commonly known as Cooley's anemia. This condition is characterized by severe anemia due to the body's inability to produce sufficient amounts of hemoglobin. Individuals affected by beta thalassemia major usually require regular blood transfusions and other treatments to manage their anemia and prevent complications.

The term "Cooley's anemia" specifically refers to the most severe form of beta thalassemia, which manifests in early childhood with significant health challenges. The name is derived from Dr. Thomas Cooley, who described the condition in the 1920s.

Other options, such as Huntington's disease, Marfan syndrome, and sickle cell disease, refer to different genetic or inherited disorders. Huntington's disease is a neurodegenerative disorder, Marfan syndrome is a connective tissue disorder, and sickle cell disease is characterized by abnormal hemoglobin leading to painful crises and other complications. These conditions are distinct from beta thalassemia major and do not relate to its classification or naming.