This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
Water brash is a classic symptom of 
Select and explain. 
A. Dyspepsia, B. Indigestion, C. GERD, D. Duodenal ulcer
C: GERD
Answer: C: GERD 
Explanation: Water brash is excessive salivation resulting from a vagal reflex triggered by acidification of the esophageal mucosa. This is not a common symptom. Afflicted individuals will describe the unpleasant sensation of the mouth rapidly filling with salty thin fluid, often in the setting of concomitant heaburn.When classic symptoms of gastroesophageal reflux are present, such as water brash and substernal heaburn, presumptive diagnosis andempirical treatment is often sufficient.Ref: Harrison; 19th edition; Page no: 1901