This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
Thickness of stomach wall in ultrasound is considered within normal limits:(JIPMER 95) 
Select and explain. 
A. 2 mm, B. 5 mm, C. 8 mm, D. 10 mm
B: 5 mm
Answer: B: 5 mm 
Explanation: The normal stomach wall measures 3 to 5 mm; however, wall thickness up to 7 mm is considered within normal limits because adequate distension is difficult to achieve on conventional sonography. Thickening can be due to neoplastic or inflammatory causes, and thickening of greater than 1 cm is generally considered to be due to malignancy.