This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding Disorders, Subject name: Pathology
[{'content': 'In PT test, the addition of Ca2+ & tissue thromboplastin activates which pathway? \nSelect and explain. \nA. Extrinsic, B. Intrinsic, C. Fibrinolytic, D. Common', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) ExtrinsicTo PT we add of Ca2+ & tissue thromboplastin which activates extrinsic pathway, while to test for aPTT we add kaolin, silica which activates intrinsic pathway.', 'role': 'assistant'}]