This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
The amount of bleaching powder necessary to disinfect choleric stools, is- 
Select and explain. 
A. 50gm/lit, B. 75 gm/lit, C. 90 gm/it, D. 100 gm/ lit
A: 50gm/lit
Answer: A: 50gm/lit 
Explanation: Bleaching powder or chlorinated lime is a white amorphous powder with a pungent smell of chlorine. It kills most of the organisms when used in a strength of 1 to 3 percent. A 5 percent solution is suitable for the disinfection of feces and urine allowing a period of one hour. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 141