Cyanocobalamine is essential for the formation of

Which of the following blood cells are capable of phagocytosis?

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?

. . . . . . $A$ . . . . . . grouping is based on the presence or absence of . . . . . . $B$ . . . . . . surface antigen on the $RBC$:

The largest $RBCs$ have been seen in

$Thrombocytes$ are cell fragments rather than true cells.