This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': '16 F foleys is used in - \nSelect and explain. \nA. Acute urinary retention, B. CA penis, C. Pyonephrosis, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Acute urinary retention * "Catheterization is mandatory for acute urinary retention. Spontaneous voiding may return, but a catheter should be left indwelling for 3 days while detrusor tone returns."- CSDT 13/e* 16F and 18F foleys are mainly used for adults* 8F and 10F are mainly used for children* Acute urinary retention is an indication for catheterization', 'role': 'assistant'}]