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
In a case of retrocecal appendicitis which movement aggravates pain: 
Select and explain. 
A. Flexion, B. Extension, C. Medial rotation, D. Lateral rotation
B: Extension
Answer: B: Extension 
Explanation: 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.
Other signs seen in appendicitis:
Obturator sign: pain on internal rotation of the hip (suggesting a pelvic appendix)
Dunphy's sign: Any movement, including coughing (Dunphy's sign), may cause increased pain
Rovsing's sign: pain in the right lower quadrant during palpation of the left lower quadrant