This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Swarming is seen in: 
Select and explain. 
A. Clostridium perfringens, B. Clostridium tetani, C. Clostridium botulinum, D. Clostridium difficile
B: Clostridium tetani
Answer: B: Clostridium tetani 
Explanation: Ans. B. Clostridium tetaniSwarming/ spreading type of growth is seen in many bacteria i.e. Proteus, Clostridium tetani, Vibrio parahemolyticus etc.