This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerves, Subject name: Anatomy
[{'content': 'A man of age 30 years came to clinic with inability to close his left eye, tears flowing over the left cheek and saliva dribbling from his left angle of the mouth. \nSelect and explain. \nA. Facial nerve palsy, B. Mandibular nerve lesion, C. Maxillary nerve injury, D. None of above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The reason for this condition is facial nerve palsy also called Bell`s palsy. It can be compressed at the stylomastoid foramen. Facial nerve supplies all the muscles of facial expression and can be checked by asking the patient to:- 1) Fill air in mouth to test buccinator 2) Close the eyes tightly to test orbicularis oculi 3) Look upwards to check the normal horizontal wrinkles', 'role': 'assistant'}]