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
Central placenta under the classification of placenta pre depending on the extension of the placenta into the lower segment comes under __________ 
Select and explain. 
A. Type 1, B. Type 2, C. Type 3, D. Type 4
D: Type 4
Answer: D: Type 4 
Explanation: Older classification of placenta pre (Browne&;s) Type Position Definition Type 1 Lateral Placenta dipping into lower segment but not reaching upto the os Type 2 Marginal Placental edge reached the os Type 3 Incomplete central Placenta covers the internal os when closed, but not when fully dilated Type 4 Central Placenta covers the internal os even when fully dilated Ref: Practical guide to High-risk pregnancy 3rd edition Pgno: 152