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 bacteria is known as pfeiffer's bacillus 
Select and explain. 
A. Hemophilus Influenzae, B. Mycoplasma pneumoniae, C. Burkholderia pseudomallei, D. Hemophilus aegyptius
A: Hemophilus Influenzae
Answer: A: Hemophilus Influenzae 
Explanation: H influenzae - pfeiffer's bacillus
M pneumoniae - Eaton's agent
B pseudomallei - Whitmore bacillus.