Posterior urethral valve is diagnosed on micturating cystometrogram by :: (A) Dilatation of posterior urethra, (B) Bladder neck contracture, (C) Vesico-Ureteric reflex, (D) Bladder wall hypertrophy
Answer is A. Micturating cystourethrogram findings :

Dilation of prostatic urethra.
Transverse linear filling defect corresponding to the valves.