This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Anatomy
[{'content': 'Blood in urine in labour is diagnostic of : \nSelect and explain. \nA. Impending scar rupture, B. Urethral injury, C. Obstructed labour, D. Cystitis', 'role': 'user'}, {'content': "Answer: C \nExplanation: In obstructed labour, bladder becomes an abdominal organ due to compression of urethra between the presenting pa and symphysis pubis - patient fails to empty the bladder The transverse depression at the junction of superior border of the bladder and distended lower segment is confused with the Bandl's ring The bladder wall get traumatized which may lead to blood stained urine, a common finding in obstructed labour Ref: Datta Obs 9e pg 379.", 'role': 'assistant'}]