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
Which of the following penicillins is given by oral route? 
Select and explain. 
A. Benzyl penicillin, B. Benzathine penicillin, C. Procaine penicillin, D. Penicillin V / Phenoxymethyl penicillin
D: Penicillin V / Phenoxymethyl penicillin
Answer: D: Penicillin V / Phenoxymethyl penicillin 
Explanation: Oral Administration of Penicillin G and V

The virtue of penicillin V in comparison with penicillin G is that it is more stable in an acidic medium and therefore is better absorbed from the GI tract, yielding plasma concentrations two to five times those provided by penicillin G. 
Thus, penicillin V is generally preferred for oral administration. 
Absorption is rapid, and maximal concentrations in blood are attained in 30–60 min.
 Ingestion of food may interfere with enteric absorption of all penicillins. Thus, oral penicillins should generally be administered at least 30 min before a meal or 2 hr after.

Reference: Goodman & Gilman’s THE PHARMACOLOGICAL BASIS OF THERAPEUTICS THIRTEENTH EDITION
Page no 1026