This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: CT SCAN, Subject name: Radiology
[{'content': 'All The following are true statements except? \nSelect and explain. \nA. MRI is preferred investigation in evaluating superior sulcus tumors, B. CECT is preferred in evaluating patients with abdominal trauma, C. Spiral Ct with contrast is preferred modality in evaluating patients with Head Trauma, D. MRI is preferred modality for evaluating posterior mediastinal masses', 'role': 'user'}, {'content': 'Answer: C \nExplanation: *IOC for Head Trauma is NCCT *IOC for Abdominal Trauma Is CECT, Initial Investigation is FAST.', 'role': 'assistant'}]