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
[{'content': "Confirmatory Test for coliform count? \nSelect and explain. \nA. Eijkman test, B. Casoni's test, C. Nitrate test, D. Urease test", 'role': 'user'}, {'content': "Answer: A \nExplanation: Eijkman test or Differential coliform test or Confirmed Escherichia coli count is a test used for the identification of coliform bacteria from warm-blooded animals based on the bacteria's ability to produce gas when grown in glucose media at 46degC (114.8degF). The test to determine whether coliform bacteria come from warm-blooded animals. By means of this test it can be readily established if water has been polluted by human and animal defecation containing coli bacilli. The test was introduced by Christiaan Eijkman (1858-1930) in his paper in 1904. Ref: https://en.m.wikipedia.org/wiki/Eijkman_test", 'role': 'assistant'}]