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
A young patient presents with history of dysphagia more to liquid than solids. The first investigation you will do is - 
Select and explain. 
A. Barium Swallow, B. Esophagoscopy, C. Ultrasound of the chest, D. C.T. Scan of the chest
A: Barium Swallow
Answer: A: Barium Swallow 
Explanation: None