This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
A 55 year old smoker presents with history of five episodes of macroscopic hematuria each lasting for about 4-5 days in the past five years. Which of the following investigations should be performed to evaluate the suspected diagnosis? 
Select and explain. 
A. Urine microscopy and cytology, B. X-Ray KUB, C. Ultrasound KUB, D. DTPA scan
A: Urine microscopy and cytology
Answer: A: Urine microscopy and cytology 
Explanation: Elderly smoker with episodes of painless hematuria should be investigated to rule out carcinoma. Among the options , initial test is urine microscopy and cytology. Ref: ABC of urology By Chris Dawson, Hugh N. Whitfield, Page 29.