Antigens are found on the …………….

The function of vitamin $K$ is:

Examination of blood of a person suspected of having anaemia shows large,immature,nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?

Which one of the following is correct?

Blood group of mother and child are $B$ and $AB$ respectively. The possible blood group of father would be .........

Example of $Rh$ incompatibility is