This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thanatology, Subject name: Forensic Medicine
[{'content': 'Bacteria most commonly involved in bowel decomposition after death is- \nSelect and explain. \nA. Streptococcus pyogens, B. Clostridium welchii, C. Pseudomonas aerogenosa, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Putrefaction is mainly caused by the action of enzyme LECITHINASE produced by clostridium welchi ( from bowels), Lecithinase caused marked hemolysis, liquefaction in blood vessels & tissue spaces. Clostirudium welchi is termed as the chief destructive agent in decomposition', 'role': 'assistant'}]