<s>[INST] context: Right phrenic nerve passes through inferior vena caval opening in the diaphragm which lies at the level of eighth thoracic veebrae. And left phrenic nerve passes through the muscular pa in front of the central tendon. Major apeures in the diaphragm:Vena caval opening in the T8 levelEsophageal hiatus at T10 levelAoic opening at T12 level. Thoracic duct and vena azygos pass through the opening along with the aoa.Minor apeures in the diaphragm:Superior epigastric vessels pass through gap between sternal origin and costal origin from seventh costal cailage.Musculophrenic vessels pass through the interval between slips of origin of diaphragm from the seventh and eighth ribs.Eighth to eleventh intercostal nerves and vessels pass through interval between adjacent coastal origins from subsequent ribs.Subcostal nerves and vessels pass behind the lateral arcuate ligament.Sympathetic chains pass behind medial arcuate ligaments.Greater, lesser and least splanchnic nerves pierces the crus of the corresponding side.Hemiazygos vein pierces the left crus.Right phrenic nerve passes through the IVC opening and left phrenic nerve through the muscular pa in front of the central tendon. [/INST] question: The right phrenic nerve passes through which of the following openings in the diaphragm? | options: A: Aoic opening B: Oesophageal opening C: Vena caval opening D: Directly pierces the diaphragm | answer: C </s>