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