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
Drug chemically related to penicillins is 
Select and explain. 
A. Tetracycline, B. Sulphonamide, C. Cephalosporin, D. Lincomycin
C: Cephalosporin
Answer: C: Cephalosporin 
Explanation: None