This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Medicine
Gastric motility decreases in - 
Select and explain. 
A. Diabetes, B. Upper abdominal surgery, C. Head injury, D. Hypothyroid
D: Hypothyroid
Answer: D: Hypothyroid 
Explanation: hypothyroidism reduces esophageal and gastric motor activity. Motility disturbances in hypothyroidism can lead to GI dysfunction. In healthy individuals normal small GI motility prevents the overgrowth of bacterial microorganisms. Ref Davidson edition23rd pg765