This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
As per national immunization schedule, 1ST DPT booster has to be given at 
Select and explain. 
A. 5-6 yrs, B. 16-24 months, C. 18 weeks, D. 16 years
B: 16-24 months
Answer: B: 16-24 months 
Explanation: DPT is given at 6,10,14 weeks 1st booster at 16-24 months and 2nd booster at 5-6yrs Ref: Textbook of Microbiology Baveja 5th ed Pg 612