This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
A vaccine which requires stringent condition for storage is 
Select and explain. 
A. DPT, B. OPV, C. BCG, D. TT
B: OPV
Answer: B: OPV 
Explanation: (Refer: K. Park's Textbook of Preventive and Social medicine, 24thedition, pg no: 222)