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: Medicine
[{'content': 'The subtype of hiatus hernia with gastric volvulus as an impoant complication is: \nSelect and explain. \nA. Type-I, B. Type-III, C. Type-IV, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Types II, III, and IV hiatal hernias are all subtypes in which the herniation includes a visceral structure other than the gastric cardia. Type II and III paraesophageal hernias, the gastric fundus also herniates Type II and III paraesophageal hernias -the stomach inves and lead to an upside down stomach, gastric volvulus, and even strangulation of the stomach. Ref: Harrison, E-18, P- 2430', 'role': 'assistant'}]