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': 'Osmotic adaptations are all except \nSelect and explain. \nA. Due to osmolysis, B. In brain cells, C. Due to urea & glucose mainly, D. Protects against large H2O shift', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]