Multiple choice

The disease, where blood cells do not carry enough oxygen is

  1. sickle cell

  2. hemophilia

  3. thrombocytopenia

  4. blood transusion
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A Correct answer
Explanation

Sickle cell disease (sickle cell anemia) causes red blood cells to assume a sickle shape due to abnormal hemoglobin S. These misshapen, rigid cells have reduced oxygen-carrying capacity and block blood vessels, causing tissue hypoxia. Hemophilia impairs clotting, thrombocytopenia reduces platelet count, and 'blood transfusion' is a procedure, not a disease.

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