This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Presumptive count includes - 
Select and explain. 
A. No E. Coli, B. Coliform but not only E. Coli, C. Gram ne gative bacilli, D. Any bacteria
B: Coliform but not only E. Coli
Answer: B: Coliform but not only E. Coli 
Explanation: Presumptive coliform count estimates the most probable number of COLIFORM organisms (and not only E.coli) in 100 ml of water. It is done with the help of McConkey's Lactose Bile Salt Broth with bromcresol purple as an indicator. Park's Textbook of Preventive and Social Medicine, 25th edition, Page No. 786