This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Thickness of stomach in ultrasound: 
Select and explain. 
A. 2 mm, B. 5 mm, C. 7 mm, D. 10 mm
B: 5 mm
Answer: B: 5 mm 
Explanation: Ans. 5 mm