Explanation:

- Stroke: It is not a blood disorder. Stroke is a medical emergency where blood flow to the brain is interrupted or reduced.

- Thalassemia: It is an inherited blood disorder. People with this condition are unable to produce sufficient hemoglobin, leading to anemia.

- Bone Marrow Failure: This condition involves the bone marrow failing to produce enough blood cells, but it isn't specifically associated with the inability to make hemoglobin.

- Thrombosis: This refers to the formation of blood clots in blood vessels. It is not related to hemoglobin production.