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': 'In human being, the least useful physiological response to low environmental temperature is: \nSelect and explain. \nA. Shivering, B. Vasoconstriction, C. Release of thyroxine, D. Piloerection', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Piloerection', 'role': 'assistant'}]