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: Pediatrics
Posterior urethral valve is diagnosed on micturating cystometrogram by- 
Select and explain. 
A. Dilatation of posterior urethra, B. Bladder neck contracture, C. Vesico-Ureteric reflex, D. Bladder wall hyperophy
A: Dilatation of posterior urethra
Answer: A: Dilatation of posterior urethra 
Explanation: Ans. is 'a' i.e., Dilatation of posterior urethra Micturating cystourethrogram findings i) Dilation of prostatic urethra ii) Transverse linear filling defect corresponding to the valves.