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
[{'content': 'Which of the following penicillins can be given by i.v.\xa0route? \nSelect and explain. \nA. Benzathine, B. Procaine, C. Crystalline, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Preparations and dose\nSod.\xa0penicillin\xa0G\xa0(crystalline\xa0penicillin)\xa0injection\xa00.5-5\xa0 MU\xa0i.m./i.v.\xa06-12\xa0hourly.\xa0It\xa0is\xa0available\xa0as dry\xa0powder in\xa0vials\xa0to\xa0be\xa0dissolved\xa0in\xa0sterile\xa0water\xa0at\xa0the\xa0time\xa0of injection.\nBENZYL PENICILLIN 0.5. 1 MU inj\nRepository penicillin G injections: These are insoluble salts of PnG which must be given by deep i.m. (never i.v.) injection. They release PnG slowly at the site of injection, which then meets the same fate as soluble PnG.\n\nProcaine penicillin G inj: 0.5-1 MU i.m. 12-24 hourly as aqueous suspension. Plasma concentrations attained are lower, but are sustained for 12-24 hours; PROCAINE PENICILLIN-G 0.5, 1 MU dry powder in vial.\nFortified procaine penicillin G inj: Contains 3 lac U procaine penicillin and 1 lac U sod. Penicillin G to provide rapid as well as sustained blood levels. FORTIFIED P.P. INJ 3+1 lac U vial: BISTREPEN 6+4 lac U/vial.\nBenzathine penicillin:\xa00.6-2.4 MU i.m. every 2-4 weeks as aqueous suspension. It releases penicillin extremely slowly-plasma concentrations are very low, but remain effective for prophylactic purposes for up to 4 weeks; PENIDURE-LA (long acting), LONGACILLIN, 0.6,1.2, 2.4 MU as dry powder in vial.\n\nReference: Essentials of Medical Pharmacology Eighth Edition KD\xa0TRIPATHI\xa0page no 769', 'role': 'assistant'}]