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
Chlorine exerts a disinfectant action in all except 
Select and explain. 
A. Cetrimide, B. Bleaching Powder, C. Halozone tablets, D. Sodium hypochlorite
A: Cetrimide
Answer: A: Cetrimide 
Explanation: None