This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Most common site of angioedema: \nSelect and explain. \nA. Hands, B. Lips, C. 3rd week, D. Eyelid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Lipsa. Angioedema is the swelling of deep dermis, subcutaneous, or submucosal tissue due to vascular leakage.b. Acute episodes often involve the lip, eyes, and face; however, angioedema may affect other parts of body, including respiratory and gastrointestinal (GI) mucosa.c. Most common site of angioedema: LIPS > Tongued. Laryngeal swelling can be life-threatening.', 'role': 'assistant'}]