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: Gynaecology & Obstetrics
An elderly multiparous woman with IUD was admitted with strong labour pains. The patient suddenly goes with shock with cyanosis, respiratory disturbance and pulmonar edema. The most likely clinical diagnosis is : 
Select and explain. 
A. Rupture uterus, B. CHF, C. Amniotic fluid embolism, D. Concealed accidental hemorrhage
C: Amniotic fluid embolism
Answer: C: Amniotic fluid embolism 
Explanation: Amniotic fluid embolism