This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
The following statement is false regarding beta-lactam group of antibiotics? 
Select and explain. 
A. Pencillins are more active against gram positive organisms, B. Amoxycillin is not suitable for meningitis, C. Pencilloic acid is the active moiety, D. Pencillin V and Pencillin G are natural pencillins
C: Pencilloic acid is the active moiety
Answer: C: Pencilloic acid is the active moiety 
Explanation: The active moiety in Pencillins having antibacterial propey is 6 amino penicillanic acid which contains beta-lactam ring. Pencilloic acid is responsible for pharmacokinetic propeies.Ref: HL Sharma 3rd ed. Pg: 728