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: Forensic Medicine
[{'content': 'Use of wadding in a smooth bore gun rifle produces all except : \nSelect and explain. \nA. Causes fatal injuries, B. Helps in lubrication, C. Optimum pressure, D. Sealing the air', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Causes fatal injuries Caridge case of shotgun has percussion (detonator) cap at the base of rim and top wad (retaining cardboard) at topQ. Wad is responsible for separation, sealing, optimal pressurization & lubrication but not for fatal injuriesQ.', 'role': 'assistant'}]