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
Complete Rx of intussception is indicated by 
Select and explain. 
A. Free passage of barium in the terminal ileum, B. Passage of feces and flatus along with barium, C. Improvement of clinical condition, D. None
A: Free passage of barium in the terminal ileum
Answer: A: Free passage of barium in the terminal ileum 
Explanation: None