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
In nodulocystic acne treatment is : 
Select and explain. 
A. Steroids, B. Antibiotics, C. Isotretinoin, D. Antifungal
C: Isotretinoin
Answer: C: Isotretinoin 
Explanation: None