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': 'The physiological effect in unacclimatised person suddenly exposed to cold is : \nSelect and explain. \nA. Tachycardia, B. Shift of blood from shell to core, C. Non shivering thermogenesis, D. Hypeension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Shift of blood from shell to core', 'role': 'assistant'}]