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
The following statements are, true for bleaching powder, except – 
Select and explain. 
A. Its action is slow and long acting, B. A fresh sample contains 33% of available chlorine, C. A strenghth of 1.3% will kill most organisms, D. It is used for disinfection of faeces
A: Its action is slow and long acting
Answer: A: Its action is slow and long acting 
Explanation: None