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': "All of the following are features of obstructed labour except : \nSelect and explain. \nA. Hot dry vagina, B. Tonic contracted uterus, C. Bandl's ring, D. Unruptured membranes", 'role': 'user'}, {'content': 'Answer: D \nExplanation: In case of obstructed labour : Membranes are ruptured Vagina is hot and dry Foul smelling discharge Ref: Datta Obs 9e pg 380.', 'role': 'assistant'}]