<prompt> A 60-yr old smoker came with a history of painless gross hematuria for one day. The most logical investigation would beRoutine urine examinationPlain x rayUSGUrine microscopy for malignant cytology  <response>: Among the given options urine microscopy is the best choice for investigating a pt. with high suspicion for bladder ca. This is not a good screening test but a positive result is highly specific. The best investigation would be cystoscopy biopsy. 