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
The antibiotic tetracycline: 
Select and explain. 
A. Is bactericidal drug., B. Is a safe drug for administration irrespective of age and sex of the patients., C. Is also administered along with penicillin., D. Is a broad-spectrum antibiotic.
D: Is a broad-spectrum antibiotic.
Answer: D: Is a broad-spectrum antibiotic. 
Explanation: Tetracycline is bacteriostatic and has a broad spectrum of action.