system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Minimum contact period for chlorination -
assistant
The correct answer is  Ans. is 'b' i.e., 1 hour Water typeRecommendedResidual chlorine levelContact periodDrinking waterWater bodies, post disasterSwimming pool sanitation> 0.5 mg per litre (ppm) >0.7 mg per litre (ppm)> 1.0 mg per litre (ppm)1 hour1 hour1 hour