This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'The cerebral peduncle consists of all the following pas except \nSelect and explain. \nA. Crus cerebri, B. Substantia nigra, C. Tegmentum, D. Tectum', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Each half of the midbrain anterior to the aqueduct is called the cerebral peduncle. Each cerebral peduncle is subdivided into (a) The crus cerebri, anteriorly; (b) the substantia nigra, in the middle; and (c) the tegmentum, posteriorlyRef: BD Chaurasia; Volume 3; 6th edition; Brain; Page no: 328', 'role': 'assistant'}]