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
Organism showing marked resistance to multidrug therapy - 
Select and explain. 
A. Haemophilus ducreyi, B. Calymmatobacterium granulomatosis, C. Gonococci, D. Treponema pallidum
C: Gonococci
Answer: C: Gonococci 
Explanation: None