This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding from the GUT and diseases of esophagus, Subject name: Medicine
Trachealization of oesophagus is seen in? 
Select and explain. 
A. Eosinophilic esophagus, B. Schatzki ring, C. GERD, D. Herpes simplex esophagitis
A: Eosinophilic esophagus
Answer: A: Eosinophilic esophagus 
Explanation: The presence of multiple corrugated rings and linear furrows all through a narrowed oesophagus is called Trachealisation of oesophagus/feline oesophagus. This is seen in eosinophilic esophagitis. Histological confirmation of eosinophilic esophagitis is made with demonstration of 15 eosinophils per HPF.