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': 'Extremely low bih weight baby is less than ? \nSelect and explain. \nA. 1 kg, B. 1.5kg, C. 2 kg, D. 2.5kg', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1 Kg Extremely LBW newborn is one which weighing less than 1000 gm at bih irrespective of gestational age.", 'role': 'assistant'}]