[A]: Genetic disorder, sickle cell anaemia is common in new born babies·
[R]: It is caused by heterozygosity for allble Hbc, producing a single ammo acid substitu tion in the a-chain of the Haemoglobin deter- mined by allele `Hb^A`

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

C