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: Social & Preventive Medicine
Not seen in faecal pollution 
Select and explain. 
A. Staphylococcus, B. Streptococcus, C. E. coli, D. ClostridiumPerfringens
A: Staphylococcus
Answer: A: Staphylococcus 
Explanation: The primary bacteriological indicators for faecal contamination are → Coliform gp. of organisms.
Supplementary indicators are →              
Streptococci faecalis,
Clostridium perfringens (also k/a cl. welchi)