Which substance does the clot formed in coagulation consist of?

$A$ woman is married for the second time. Her first husband was $ABO$ blood type $A,$ and her child by that marriage was type $O.$ Her new husband is type $B$ and their child is type $AB.$ What is the woman's $ABO$ genotype and blood type?

The most active phagocytic white blood cells are ...........

Which of the given options is correct regarding blood groups and donor compatibility?

Which of the following is required for the conversion of prothrombin into thrombin?

What is the primary function of Red Blood Cells (RBCs)?