This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
[{'content': 'Which of the following is complication of heparin? \nSelect and explain. \nA. Bleeding, B. Thrombocytopenia, C. Osteoporosis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. All of the aboveAnticoagulantsHeparin: Activating antithrombin (previously known as antithrombin III)Side Effectsa. Bleedingb. Thrombocytopenia:c. Osteoporosisd. Elevated Levels of Transaminases: without a concomitant increase in the level of bilirubin.', 'role': 'assistant'}]