This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Immunity by vaccine is- 
Select and explain. 
A. Active natural, B. Passive natural, C. Active acquired, D. Passive acquired
C: Active acquired
Answer: C: Active acquired 
Explanation: .vaccine is an immunobiological substance designed to produce specific protection against a given disease.it stimulates the production of protctive antibody and other immune mechanisms.it can be prepared from live modified organisms,inactivated or killed organisms,extracted cellular fractions,toxoids,or combination of these.hence vaccines induces active acquired immunity. ref:park&;s textbook,22 nd ed,pg 99