A patient present with dysphagia of 4 weeks duration. Now he is able to swallow liquid food only. Which of the following is the one investigation to be done ?
A
Barium studies are the best in this case
B
Upper GI endoscopy is to be done
C
CT scan is needed
D
Esophageal manometry
High-Yield Explanation
Answer is 'b' i.e. Upper GI endoscopy is to be done