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
The following is a killed vaccine 
Select and explain. 
A. Varicella, B. BCG, C. OPV, D. Meningococcal vaccine
D: Meningococcal vaccine
Answer: D: Meningococcal vaccine 
Explanation: Peussis, meningococcal, Salk, cholera, rabies, influenza are killed vaccines BCG OPV are live attenuated vaccines Ref: Textbook of Microbiology Baveja 4th ed Pg 617