Correct option is C
Sol. Platelets, also called thrombocytes, are small, disc-shaped cell fragments in the blood that are essential for blood clotting. When a blood vessel is injured, platelets aggregate at the site to form a clot and stop bleeding.
Explanation of each option:
· (a) WBC (White Blood Cells) – These are immune cells that help fight infection but do not participate in blood clotting.
· (b) RBC (Red Blood Cells) – They carry oxygen using hemoglobin but have no role in the coagulation process.
· (c) Platelets – Correct answer. They release clotting factors and help form a plug at injury sites, initiating the clotting cascade.
· (d) Lymphocytes – A subtype of WBCs involved in adaptive immunity (B-cells and T-cells), not clot formation.