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
Properties of Ideal disinfectant except 
Select and explain. 
A. Insoluble in water, B. Non toxic, C. Fast acting, D. Residual effect
A: Insoluble in water
Answer: A: Insoluble in water 
Explanation: None