Distance of the Lower Esophageal Sphincter from the upper incisors is: (A) 15cm, (B) 22.5cm, (C) 27.5cm, (D) 37.5cm
Answer is D. Lower oesophageal sphincter is seen in lower pa of oesophagus where it pierces diaphram. It is 37.5cm/15inch from incisor teeth. Ref - BDC vol 1 6th edition pg 282