This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': 'Unit of measurement of insulation of clothing is \nSelect and explain. \nA. Cl units, B. Clo Units, C. Clot units, D. Cloth units', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Clothing insulation is the thermal insulation provided by clothing.Clothing insulation may be expressed in clo units1 Clo = 0.155 m2K/WClo = 0 - corresponds to a naked personClo = 1 - corresponds to the insulating value of clothing needed to maintain a person in comfo sitting at rest in a room at 21 (70 ) with air movement of 0.1 m/s and humidity less than 50% - typically a person wearing a business suit', 'role': 'assistant'}]