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: Surgery
[{'content': 'All the following are characteristic feature of anaphylactic shock EXCEPT \nSelect and explain. \nA. Angioedema, B. Urticarial rash, C. Pedal edema, D. Flushing', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]