STD 11 - 15. Body fluids and criculations — NEET STD 11 Science — Question

$(1)$ Haemophilia is a sex­linked recessive disease.

$(2)$ Down’s syndrome is due to aneuploidy.

$(3)$ Phenylketonuria is an autosomal recessive gene disorder.

$(4)$ Sickle cell anaemia is an $X$-­linked recessive gene disorder.

$I.$ Increase vitamin - $B_{12}$ amount, thus increasing nutrient quality of milk

$II.$ Checks disease causing microbes in stomach

Choose the correct option