This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NEET 2018, Subject name: Radiology
CT thorax represents:- 
Select and explain. 
A. Ascending aoic dissection, B. Descending aoic dissection, C. Aoic aneurysm, D. Cystic fibrosis
A: Ascending aoic dissection
Answer: A: Ascending aoic dissection 
Explanation: * In the given image we could see the intimal flap creating 2 lumens- Small and contrast opacifying - true lumen- Large and less contrast - false lumen* AAD is more dangerous as they involve Aoic root, coronary vessels and can also cause cardiac tamponade. Hence surgical management is done for these cases.