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: Social & Preventive Medicine
[{'content': 'A hospital has always some beds vacant for emergency, isolation, emergency etc. These vacant beds are known as: \nSelect and explain. \nA. Essential bed space, B. Mandatory bed space, C. Dead bed space, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: A hospital has always some beds vacant for emergency, isolation, emergency etc. These vacant beds are known as dead bed space. This accounts for around 15 to 20%. Ref: Textbook of community medicine, S. Lal, 3rd edition pg: 686.', 'role': 'assistant'}]