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
Investigation of choice to Determine Local Invasion in Esophageal Carcinoma(T staging) is? 
Select and explain. 
A. Transabdominal Usg, B. CECT, C. Endpscopic USG, D. MRI
C: Endpscopic USG
Answer: C: Endpscopic USG 
Explanation: Endoscopic Ultrasound - Determines Local Invasion In Esophageal Carcinoma(T staging).