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': 'A 15-year male presented with pain in the inguinal area and lower abdomen presents with tenderness over a non-reducible swelling\nwith negative cough impulse. Diagnosis: \nSelect and explain. \nA. Strangulated hernia, B. Testicular torsion, C. Scrotal abscess, D. Femoral hernia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Strangulation occurs more often in patients who have worn a truss for a long time and in those with a partially reducible or an irreducible hernia\nIndirect inguinal hernias strangulate more commonly, the direct variety not so often because of the wide neck of the sac.\nMC constricting agent: Neck of the sac > External inguinal ring in children > Adhesions within the sac.\nMC contents: Small intestine > Omentum Clinical features of strangulated inguinal Hernia\nSudden onset inguinal pain\nGeneralized abdomen pain\nTense and extremely tender hernia\nDiscolouration of overlying skin with a reddish or bluish tinge\nThere is no expansile cough impulse.', 'role': 'assistant'}]