Sickle-cell anemia is a disease caused due to the abnormality in A. White blood cell B. Red blood cell C. Thrombocytes D. Blood plasma composition

The correct answer is: B. Red blood cell

Sickle-cell anemia is a genetic disorder that affects the red blood cells. The red blood cells are shaped like a sickle, which is a curved, crescent-shaped object. This abnormal shape of the red blood cells can cause them to break down more easily, which can lead to anemia. Anemia is a condition in which the body does not have enough healthy red blood cells.

Sickle-cell anemia is a lifelong condition. There is no cure, but there are treatments that can help manage the symptoms and complications of the disease.

The other options are incorrect because:

• White blood cells are part of the immune system. They help the body fight infection.
• Thrombocytes are also known as platelets. They help the blood to clot.
• Blood
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