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': "Trigeminal or Meckel's cave is present in relation to: \nSelect and explain. \nA. Falx cerebri, B. Falx cerebelli, C. Tentorium cerebelli, D. Diaphragma sellae", 'role': 'user'}, {'content': "Answer: C \nExplanation: Meninges of Brain\ni) Brain is protected by\n\nBony covering of the cranium\nThree membranous coverings (Meninges)\n\nii) The three meninges are\n\nOuter duramater\nMiddle arachnoid mater\nInner piamater\n\niii) The dura mater is outermost and thickest of all meninges. It encloses cranial venous sinuses and has a distinct blood supply and nerve supply.\niv) The duramater has two layers - an outer endosteal layer and an inner meningeal layer.\nv) The outer endosteal layer forms the endosteum of skull.\nvi) The meningeal layer is folded and form partitions which divide cranial cavity into compartments. The folds are\n\nfalx cerebri\nfalx cerebella\nTentorium cerebella\nDiaphragma Sella.\n\nvii) FALX CEREBRI\nIt is a large sickle shaped fold of duramater occupying the median longitudinal fissure between two cerebral hemispheres.\nThe superior sagittal sinus, inferior sagittal sinus and the straight sinus are closely related to falx cerebri.\nviii) FALX CEREBELLI\nIt is present in the posterior cerebellar notch.\nix) TENTORIUM CEREBELLI\nIt forms the roof of the posterior fossa and separates the cerebellum from occipital lobes of the cerebrum. The trigeminal or meckel's cave is present in relation to tentorium cerebelli.\nx) DIAPHRAGMA SELLAE\nIt is a small circular, horizontal fold of duramater forming the roof of the hypophyseal fossa.\nThe diaphragm has a central aperture through which the stalk of hypophysis cerebri passes.", 'role': 'assistant'}]