This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
Complement deficiency predispose to infection with- 
Select and explain. 
A. Pseudomonas aeruginosa, B. Cytomegalovirus, C. Neisseria meningitidis, D. Giardia lamblia
C: Neisseria meningitidis
Answer: C: Neisseria meningitidis 
Explanation: Neisseria meningitidis infection is seen in compliment deficiency Pseudomonas infection is seen in Phagocyte deficiency Giardia infection is seen in Antibody Infection Cytomegalovirus infection is seen in T lymphocyte deficiency Reference : Davidson, 23rd Edition, page no : 73.