$A$ person with antigens $A$ and $B$ and no antibodies belongs to which blood group?

Which disease can be caused by the $Rh$ factor?

The most well-known blood grouping system is the $ABO$ system. It is named $ABO$ and not $ABC$ because the $\text{O}$ in it refers to having:

Antibodies are produced by

Cyanocobalamine is essential for the formation of

Which of the following statements are correct regarding thrombocytes?
$I$ - Also known as blood platelets.
$II$ - They are cell fragments.
$III$ - Produced from megakaryocytes.
$IV$ - Their count in a normal individual ranges from $3,50,000$ to $6,00,000$ per $mm^3$.
$V$ - Involved in the process of blood coagulation.