Question

what is the primary function of platelets?
a plasma formation
b blood clotting
c cellular immunity
d antigen formation

Explanation:

Platelets, also known as thrombocytes, are small cell - like fragments in the blood. Their main role is to form blood clots at the site of a damaged blood vessel to prevent excessive bleeding. Plasma is the liquid part of blood and not formed by platelets. Cellular immunity is mainly related to T - cells. Antigens are substances that can trigger an immune response and are not formed by platelets.

Answer:

B. blood clotting