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: Dental
Immediately after eating, a man develops swelling of face and lips, respiratory distress, intense pruiritis, hypotension and feeling of impending doom. The most likely diagnosis is – 
Select and explain. 
A. Angioneurotic edema, B. Anaphylaxis, C. Myocardial infarction, D. Food stuck in throat
B: Anaphylaxis
Answer: B: Anaphylaxis 
Explanation: This patient has :-


Swelling of face & lip    → can occur in both anaphylaxis or locally as angioneurotic edema.
Respiratory distress → can occur in both anaphylaxis or angioneurotic edema.
Intense pruritis    → Occurs in anaphylaxis but not in angioneurotic edema.
Hypotension  → Occurs in anaphylaxis but not in angioneurotic edema.


So, the diagnosis is anaphylaxis.