This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, 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: B i.e. Contractile proteinThrombosthenin - is a contractile protein found within platelets.Q It helps the platelets to contract during clot formation.Other contractile proteins found within platelets are?(i) Actin(ii) Myosin