This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Which of the following PDE- 5 inhibitor has no interaction with high fat meal intake \nSelect and explain. \nA. Sidenafil, B. Vardenafil, C. Tadalafil, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: High fat meal interferes with absorption of sildenafil and vardenafil but not tadalafil.', 'role': 'assistant'}]