This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
[{'content': 'Radiopharmaceutical used for liver scan is \nSelect and explain. \nA. Technetium 99m sulphur colloid, B. Tc99m mebrofenin, C. Tc-99m MIBI, D. Tc99m DTPA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A radio active subtance called radio pharmaceutical is formed or radio active tracer is formed by addition of a radioactive atom to a moleclue absorbed by a normal liver tissue.', 'role': 'assistant'}]