This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Investigation of choice for diagnosis of splenic rupture – 
Select and explain. 
A. Peritoneal lavage, B. Ultrasound, C. CT scan, D. MRI
C: CT scan
Answer: C: CT scan 
Explanation: "CT has become the gold standard for the assessment of abdominal trauma particularly solid parenchymal injury".