This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Nerve of Grassi is related to? \nSelect and explain. \nA. Facial nerve, B. Glossopharyngeal nerve, C. Vagus nerve, D. Hypoglossal nerve', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The nerve of Grassi is one of the branches of posterior vagal trunk that supplies the gastric fundus. It provides parasympathetic supply. -Reference: Textbook of anatomy, Abdomen and Lower limb, Vishram Singh, 2nd edition, page no.102', 'role': 'assistant'}]