<prompt> One year old male child presented with poor urinary stream since bih. The investigation of choice for evaluation is -Voiding cystourethrography VCUGUSG bladderIntravenous urographyUroflowmetry  <response>: Ans. is a i.e., Voiding cystourethrography o Poor urinary stream since bih suggests urinary tract obstruction usually infravesical. o Most common cause of urinary tract obstruction in a male child is posterior urethral valve. o And the best diagnostic method for posterior urethral valve is voiding cystourethrogram. 