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: Pathology
Pigmented lesions of oral mucosa do occur because of the consumption of following drug EXCEPT 
Select and explain. 
A. Nifedipine, B. Zidovudine, C. Minocycline, D. Oral contraceptives
A: Nifedipine
Answer: A: Nifedipine 
Explanation: None