During the process of blood coagulation,vitamin $K$ helps in

Blood group $AB$ has

Identify the cells and their functions based on the provided figure:
$(a)$ Fig. $A$ - Megakaryocyte - formation of platelets
$(b)$ Fig. $B$ - Lymphocyte - synthesis of antibodies
$(c)$ Fig. $A$ - Eosinophil - secrete antihistamine
$(d)$ Fig. $A$ - Neutrophil - secrete heparin

What is thrombin?

Which of the following work as phagocytes?

$A$ reduction in their number will lead to excessive loss of blood from the body.