system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
After 28 weeks of gestation true is/are:a)  Viableb) > 1000 gm c) Lecithin/Sphingomyelin ratio >2d) Type II pneumocytes presente) Phosphatidyl glycerol present
assistant
The correct answer is  None