This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hernia and abdominal wall, Subject name: Surgery
[{'content': "On examination of the patient for a hernia, it is useful to realize that: \nSelect and explain. \nA. An impulse is often much better seen than felt, B. The internal abdominal ring lies 1.25 cm above the midpoint of poupa's ligament, C. The external abdominal ring lies 1.25 cm above and medial to ASIS, D. None of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: CLINICAL FEATURES Males are 20 times more commonly affected than females. The patient complains of pain in the groin or pain referred to the testicle when performing heavy work or taking strenuous exercise. When asked to cough, a small transient bulging may be seen and felt together with an expansile impulse. Large hernias : Sensation of weight and dragging on the mesentery may produce epigastric pain.', 'role': 'assistant'}]