This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vaccines, Subject name: Social & Preventive Medicine
Vaccine carrier can maintain temperature of vaccines for:- 
Select and explain. 
A. 06 - 12 hours, B. 12 - 18 hours, C. 48 - 96 hours, D. 24 - 48 hours
D: 24 - 48 hours
Answer: D: 24 - 48 hours 
Explanation: Vaccine Carrier:- Used to transpo from PHC to site of immunization and sub- centres. It is non-electronic instrument with 4 ice packs inside it. Max 16-20 vaccine ls can be kept inside it. It can maintain temp for 24-48 hours.