This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
Posterior epistaxis occurs from: 
Select and explain. 
A. woodruff's plexus, B. Kiesslebach's plexus, C. Atherosclerosis, D. Littles area
A: woodruff's plexus
Answer: A: woodruff's plexus 
Explanation: Woodruff's Plexus - Site of posterior epistaxis in adults. Plexus of veins situated inferior to posterior end of inferior turbinate Ref: Dhingra 7e pg 197.