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