<prompt> All of the following statements regarding penicillin-G are true, EXCEPT:Can be given orallyActive against gram positive organismsProbenecid given along with penicillin-G increases its duration of actionActs by inhibition of cell wall synthesis  <response>: Penicillin G is acid labile and it is destroyed easily by gastric acid, and hence it can only be given parenterally intravenously or intramuscularly and not orally. Ref: KDT, 6th Edition, Pages 696-97 ; Streptococcal Pharyngitis: Optimal Management By Jean Claude Pechere, 3rd Volume, Page 188 ; Drugs in Pregnancy and Lactation: A Reference Guide to Fetal and Neonatal Risk By Gerald Briggs, Roger K. Freeman, Sumner J. Yaffe, Page 205 