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: Skin
Grisefulvin given for the treatment of fungal infection in the fingure nail dermatophytosis for how much duration 
Select and explain. 
A. 4 weeks, B. 6 weeks, C. 2 months, D. 3 months
D: 3 months
Answer: D: 3 months 
Explanation: D i.e. 3 months Tinea unguium is dermatophyte infection of nail plateQ. It is treated by topical ciclopiro oleamine & amorolfineQ (in cases without nail matrix involvement) and/or oral terbinafine, itraconazole, fluconazole and griseofulvinQ (in cases with nail matrix involvement).