This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
"Citron bodies" are formed by? 
Select and explain. 
A. Clostridium welchii, B. Clostridium oedematiens, C. Clostridium septicum, D. Clostridium histolyticum
C: Clostridium septicum
Answer: C: Clostridium septicum 
Explanation: Citron bodies - Boat or leaf-shaped pleomorphic bacilli with irregular staining on gram stained smears in a suspected case of gas gangrene suggests Cl. septicum