This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Anatomy
A 60-yr old smoker came with a history of painless gross hematuria for one day. The most logical investigation would be 
Select and explain. 
A. Routine urine examination, B. Plain x ray, C. USG, D. Urine microscopy for malignant cytology
D: Urine microscopy for malignant cytology
Answer: D: Urine microscopy for malignant cytology 
Explanation: 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.