A) Malarial infection
B) Iron deficiency
C) Poor hygiene
D) none of these
Correct Answer: D
Solution :
Sickle-cell disease (SCD), also known as sickle-cell anaemia (SCA), is a hereditary blood disorder, caused by an abnormality in the oxygen-carrying protein haemoglobin found in red blood cells. This leads to a propensity for the cells to assume an abnormal, rigid sickle-like shape under certain circumstances. Sickle-cell disease is associated with a number of acute and chronic health problems, such as severe infections, attacks of severe pain ("sickle-cell crisis"), stroke, and an increased risk of death.
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