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 characteristics of polio vaccine are all except- 
Select and explain. 
A. Maintenance of cold chain, B. 100 % immunisation, C. Killed vaccine is effective in India, D. 5 doses of OPV given
B: 100 % immunisation
Answer: B: 100 % immunisation 
Explanation: None