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
[{'content': 'A 60-year-old male presents with haematuria at the onset of micturition - the cause is - \nSelect and explain. \nA. Urethral stone, B. Bladder tumor, C. Ureteric stone, D. Prostatitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Relation of hematuria to micturition Site of bleeding Blood appears at the begining Urethra Blood appears at the end Vesical Blood is intimately mixed throughout the process Prerenal, renal or Vesical ref : S. Das manual 4/e p408', 'role': 'assistant'}]