This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
The classical triad of amniotic fluid embolism includes except ________ 
Select and explain. 
A. Metabolic acidosis, B. Hypotension, C. Hypoxia, D. Severe consumptive coagulopathy
A: Metabolic acidosis
Answer: A: Metabolic acidosis 
Explanation: The classical triad of amniotic fluid embolism includes the following: Hypotension Hypoxia Severe consumptive coagulopathy Predisposing conditions: Rapid labor Mecomium-stained aminotic fluid Tears into uterine and other large pelvic veins Older maternal age Post-term preganancy labbor induction or augmentation Eclampsia Casarean/forceps/vaccum delivery Placental abruption / placenta pre Hydraminos Clinical picture: Late stage of labor/immediate postpaum: Sudden gasping for air - Sudden seizures/Cardiorespiratory arrest - massive hemorrhage due to disseminated intravascular coagulation (DIC) Ref:Online resources