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
Causative organism of "glanders" is: 
Select and explain. 
A. Leptospira, B. Burkholderia mallei, C. Pseudomonas pseudomallei, D. Chlamydia
B: Burkholderia mallei
Answer: B: Burkholderia mallei 
Explanation: Burkholderia mallei