This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'At PHC level vaccine storage is by? \nSelect and explain. \nA. IRL, B. Walk in cold rooms, C. Cold boxes, D. vaccine carriers', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .ice lined refrigerators(ILR)are mkept at the PHC level.the cabinet temperature is maintained at 2 to 8 degree celsius.at the PHC level,ILR s are used to store all UIP vaccines.they are lined with tubes or ice packs filled with water which freezes and keeps the internal temperature at a safe level.</p><p>ref:park&;s textbook of preventive and social medicine,22 nd edition ,pg no 104</p>', 'role': 'assistant'}]