This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiopulmonary resuscitation and mechanical ventilation, Subject name: Anaesthesia
[{'content': 'About CPAP all are true except \nSelect and explain. \nA. Given prophylactically in all preterm with respiratory distress, B. Staed with Fi02 50-60%, C. Given in infants less than 28 weeks and less than 1 kg weight, D. Improves oxygenation and improves lung compliance', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CPAP is used for the infants whose lungs are fully developed.', 'role': 'assistant'}]