This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Angiography, Subject name: Radiology
IOC for Acute Aoic Dissection in a Clinically Unstable patient is? 
Select and explain. 
A. NCCT, B. CT-Angio, C. TEE, D. MRI
C: TEE
Answer: C: TEE 
Explanation: *In Acute Aoic Dissection Stable Patient-CT-Angio (MDCT with contrast) Unstable Patient-TransEsophageal Echo(TEE)