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: Surgery
Investigation of choice forF'acute appendicitis in children: 
Select and explain. 
A. CT scan, B. Ultrasound, C. MRI, D. X-ray
B: Ultrasound
Answer: B: Ultrasound 
Explanation: Ans. b. Ultrasound