This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
[{'content': 'Trochlear nerve supplies \nSelect and explain. \nA. Superior oblique, B. Inferior oblique, C. Lateral rectus, D. Inferior rectus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. (Superior oblique) (115-BDC-3 4th)* Trochlear nerve - is very long and slender nerve supplies only the superior oblique muscle of the eye ball* Abducent - is a small motor nerve supplies the lateral rectus muscle**', 'role': 'assistant'}]