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': 'In a case of retrocecal appendicitis which movement aggravates pain: \nSelect and explain. \nA. Flexion, B. Extension, C. Medial rotation, D. Lateral rotation', 'role': 'user'}, {'content': "Answer: B \nExplanation: In retrocecal appendicitis, inflamed appendix is in contact with psoas muscle causing flexion of the hip joint. Hyperextension of the hip joint may induce abdominal pain. This is known ‘illopsoas sign' and is typical of retrocecal appendicitis.\nOther signs seen in appendicitis:\nObturator sign: pain on internal rotation of the hip (suggesting a pelvic appendix)\nDunphy's sign: Any movement, including coughing (Dunphy's sign), may cause increased pain\nRovsing's sign: pain in the right lower quadrant during palpation of the left lower quadrant", 'role': 'assistant'}]