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
Sulfonamides inhibit bacterial synthesis of folic acid by: 
Select and explain. 
A. Uncompetitive inhibition., B. Allosteric inhibition., C. Competitive inhibition., D. Non competitive inhibition.
C: Competitive inhibition.
Answer: C: Competitive inhibition. 
Explanation: None