This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood: Hemostasis and Blood Coagulation, Subject name: Physiology
Thrombosthenin is a/an 
Select and explain. 
A. Thrombosis preventing protein, B. Contractile protein, C. Coagulation protein, D. Protein for regulating platelets production
B: Contractile protein
Answer: B: Contractile protein 
Explanation: Ans. is 'b' is Contractile protein Thrombosthenin is a contractile protein found within platelets. It helps the platelets to contract during clot formation.Other contractile proteins found within platelets are-Actin andMyosin molecules