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
All of the following are features of obstructed labour except : 
Select and explain. 
A. Hot dry vagina, B. Tonic contracted uterus, C. Bandl's ring, D. Unruptured membranes
D: Unruptured membranes
Answer: D: Unruptured membranes 
Explanation: In case of obstructed labour : Membranes are ruptured Vagina is hot and dry Foul smelling discharge Ref: Datta Obs 9e pg 380.