This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Fibres passing through crus-cerebri are - \nSelect and explain. \nA. Corticonuclear and cortricospinal fibres, B. Medial lemniscus, C. Spinothalamic, D. All', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Crus cerebri contains : \n\nMiddle two-third is occupied by corticospinal and corticobulbar (corticonuclear) fibers. \nMedial one-sixth is traversed by fronto-pontine fibers; and \nlateral one sixth contains temporopontine, parietopontine and occipitopontine fibers.', 'role': 'assistant'}]