Injection for small pox should be given within _______________________ month birth?

A. Explosive strength
B. Strength
C. Maximum strength
D. All of these

Smallpox is caused by the Variola viruses.
To prevent infection, vaccination is considered to be highly effective.
So Vaccine is given within six month
This Question right ans is Six (6) month

The correct answer to the question: "Injection for small pox should be given within _______________________ month birth?" is "Maximum strength".