This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which amongst the following biological agents carries the least potential for use as a biological weapon for microbial terrorism? 
Select and explain. 
A. Plague (Yersinia pestis), B. Small pox (variola major), C. Botulism (Cl. botulinum), D. Brucellosis (Brucella sp)
D: Brucellosis (Brucella sp)
Answer: D: Brucellosis (Brucella sp) 
Explanation: Brucellosis (Brucella sp.) is classified as 'Category B' agent with second highest priority/potential for use as a biological weapon for microbial terrorism.


Plague, smallpox and Botulism belong to 'Category A' as defined by CDC with the highest potential for use as biological weapons.