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: Surgery
[{'content': 'True about hernia - \nSelect and explain. \nA. External abdominal hernia is common, B. Direct hernia usually acquired, C. Strangulation is common in femoral hernia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'a\' i.e. Extra-abdominal hernia is common; \'b\' i.e. Direct hernia is usually acquired; \'c\' i.e. Strangulation is common in femoral hernia "External abdominal hernia is the most common form, the most frequent varieties being the inguinal femoral & umbilical, accounting for 75%" - Bailey & Love 24/e p1272] "Direct hernia is always an acquired type except the Ogilive hernia and occurs in elderly person" - S. Das 3/e p1095', 'role': 'assistant'}]