This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2017, Subject name: Microbiology
Meningococcal meningitis is seen with which of the following complement deficiency? 
Select and explain. 
A. C1q, B. C2, C. C4, D. C5
D: C5
Answer: D: C5 
Explanation: o C5-C9 -complement deficiency (MAC) membrane attack complex o Late complement deficiency are prone for recurrents Neisserial infections (meningo & gonococci both) o C1 esterase inhibitor deficiency: leads to Hereditary Angioneurotic edema