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
Vaccine which must be stored in the freezer compartment of a fridge is/are -a)  BCGb)  OPVc)  Measlesd)  Smallpoxe)  All of the above 
Select and explain. 
A. ce, B. bc, C. cde, D. eb
B: bc
Answer: B: bc 
Explanation: None