This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ULTRASOUND, Subject name: Radiology
[{'content': 'Investigation of choice to Determine Local Invasion in Esophageal Carcinoma(T staging) is? \nSelect and explain. \nA. Transabdominal Usg, B. CECT, C. Endpscopic USG, D. MRI', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Endoscopic Ultrasound - Determines Local Invasion In Esophageal Carcinoma(T staging).', 'role': 'assistant'}]