Pathology In Prothrombin time (PT) estimation, on addition of calcium and thromboplastin to platelet poor plasma. which of the following pathway is activated? A Extrinsic B Intrinsic C Fibrinolysis D Common 💡 Explanation In Prothrombin time (PT) estimation, on addition of calcium and thromboplastin to platelet poor plasma. which of the following pathway is activated? ✓ Correct Answer: A. Extrinsic