The old and worn-out $RBCs$ are filtered out by:

If a child has blood group $O$ and the mother has blood group $A$,which blood group cannot be the father's?

The disease Erythroblastosis foetalis in the human embryo is caused due to:

If the foetus is $Rh^+$ and the mother is $Rh^-$,then:

Donors and recipients in a blood transfusion process can be:

If a mother possesses only '$B$' antibodies (implying blood group '$A$') and the father has blood group '$O$',what will be the possible blood group$(s)$ of the child?