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
Bacteria most commonly involved in bowel decomposition after death is- 
Select and explain. 
A. Streptococcus pyogens, B. Clostridium welchii, C. Pseudomonas aerogenosa, D. None
B: Clostridium welchii
Answer: B: Clostridium welchii 
Explanation: 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