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: Surgery
Which is the most common symptom of achalasia 
Select and explain. 
A. Regurgitation, B. Dysphagia, C. Heartburn, D. Weight loss
B: Dysphagia
Answer: B: Dysphagia 
Explanation: Dysphagia is the most common symptom seen in 95% of the patients.
Initially it is more to liquids. In later stages both solids and liquids.
Regurgitation is the second most common symptom and earliest symptom.