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
Fresh bleaching powder contains 
Select and explain. 
A. 0.33% chlorine, B. 3.3% chlorine, C. 33% chlorine, D. 0.033% chlorine
C: 33% chlorine
Answer: C: 33% chlorine 
Explanation: None