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
[{'content': 'Transcellular fluids are present in \nSelect and explain. \nA. Body cavitites, B. Plasma, C. Interstitial space, D. Intranuclear space', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Transcellular fluid is part of ECF present in body cavities\xa0\nEg:Pleural fluid, pericardial fluid.', 'role': 'assistant'}]