This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
Which of the following are Unresectable criteria for Cancer pancreas in CT scan? 
Select and explain. 
A. Metastatic deposits in vertebra, B. Invasion of duodenum, C. Irregular increase in fat density of omentum, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Ans. (d) All the aboveRef: NCCN Guidelines 2017CECT Scan Criteria of unrespectability in cancer Head of Pancreas:* Tumor contact with SMA >180 degrees* Tumor contact with Coeliac Artery >180 degrees* Tumor contact with 1st jejunal Branch of SMA* Unreconstructable SMV/PV due to tumor Involvement or Occlusion (Due to tumor or Thrombus)* Contact with most proximal draining branch of jejunum into SMV