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': 'Extracellular fluid includes all except? \nSelect and explain. \nA. Interstitial fluid, B. Mesenchymal fluid, C. Blood plasma, D. Intracellular fluid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]