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: Anatomy
Best test for esophageal varices is 
Select and explain. 
A. CT scan, B. Gastroesophagoscopy, C. Tomography, D. Ultrasound
B: Gastroesophagoscopy
Answer: B: Gastroesophagoscopy 
Explanation: .