Pick out the correct statement
(I) Haemophilia is a sex-linked recessive disease
(II) Down's syndrome is due to aneuploidy
(III) Phenylketonuria is an autosomal recessive gene disorder lt brgt (IV) Sickle-cell anaemia is an X-linked recessive gene disorder

Options

A. II and IV
B. I, III and IV
C. I, II and III
D. I and IV

Answer

C

Explanation

Sickle-cell anaemia is an autosomal recessive gene disorder in which sickle-celled RBCs are formed instead of normal ones. They carry very less content of O2 as their haemoglobin is malformed. The person suffering from this disease shows symptoms of anaemia