This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Extremely low bih weight refers to neonates weighing 
Select and explain. 
A. < 2500 grams, B. < 2000 grams, C. < 1500 grams, D. < 1000 grams
D: < 1000 grams
Answer: D: < 1000 grams 
Explanation: Low bihweight refers to neonates weighing 1500 to 2500 g; Very low bihweight are those between 1000 and 1500 g; and Extremely low bihweight refers to those between 500 and 1000 g.Reference: William's Obstetrics; 25th edition; Chapter 42; Preterm bih