Q.

Sickle-cell anemia is a disease caused due to the abnormality in –

A. white blood cells
B. red blood cells
C. thrombocytes
D. blood plasma composition
Answer» B. red blood cells
Explanation: Sickle cell anemia (sickle cell disease) is a disorder of the blood caused by an inherited abnormal hemoglobin (the oxygen- carrying protein within the red blood cells).
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