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
Oral cephalosporin among these is : 
Select and explain. 
A. Cefatoxime, B. Ceftriaxone, C. Cefaclor, D. Ceftazidime
C: Cefaclor
Answer: C: Cefaclor 
Explanation: None