This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Choose the right combination: 
Select and explain. 
A. Gram staining - Gram negative bacilli, B. Gram staining - Mycobacterium tuberculosis, C. Z N staining - Mycobacterium tuberculosis, D. Z N staining - Gram negative bacilli
C: Z N staining - Mycobacterium tuberculosis
Answer: C: Z N staining - Mycobacterium tuberculosis 
Explanation: Ans. is 'c' i.e., Z.N. staining - Mycobacterium tuberculosisImage description - Z.N. staining of smear showing long slender, beaded, red colored acid fast bacilli with numerous pus cells against blue background.