Sickle cell anaemia occurs due to
A. Replacement of glutamate by valine in α-strand of haemoglobin
B. Replacement of valine by glutamate in α-strand of haemoglobin
C. Replacemrnt of glutamate by valine in β-strand of haemoglobin
D. Replacement of valine by glutamate in β-strand of haemoglobin
Answer: Option C
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