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
All drugs cause interstitial lung disease, except : 
Select and explain. 
A. Phenytoin sodium, B. Sulfonamide, C. Busulfan, D. Alpha methyldopa
D: Alpha methyldopa
Answer: D: Alpha methyldopa 
Explanation: Drugs causing interstitial lung disease are:

Amiodarone
Nitrosoureas
Busulfan
Phenytoin
Methotrexate
Sulfonamides
Penicillamine
Cyclophosphamide
Nitrofurantoin
Gold salts
Bleomycin