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: Medicine
Gastric motility decreases in all EXCEPT 
Select and explain. 
A. Diabetes, B. Upper abdominal surgery, C. Head injury, D. Hyper thyroid
D: Hyper thyroid
Answer: D: Hyper thyroid 
Explanation: None