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: Pharmacology
Minimum inhibitory concentration is - 
Select and explain. 
A. The concentration of antibiotic which kills 99.9% of the bacteria, B. Maximum concentration of an antibiotic which prevents visible growth of a bacterium, C. Minimum concentration of an antibiotic which prevents visible growth of a bacterium, D. None of the above
C: Minimum concentration of an antibiotic which prevents visible growth of a bacterium
Answer: C: Minimum concentration of an antibiotic which prevents visible growth of a bacterium 
Explanation: Ans. is 'c' i.e., Minimum concentration of an antibiotic which prevents visible growth of a bacterium o Potency of antimicrobial agents is often referred as MIC. Minimum inhibitory concentration (MIC) o Lowest concentration of an antibiotic which prevents visible growth of a bacterium. Minimum bactericidal concentration (MBC) o The concentration of an antibiotic which kills 99.9% of the bacteria. A small difference between MIC and MBC indicates that the antibiotic is primarily bactericidal, while a large difference indicates bacteriostatic action.