This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of skin, Subject name: Dental
Nail is involved in all except- 
Select and explain. 
A. Psoriasis, B. Lichen planus, C. Fungal infection, D. androgenetic alopecia
D: androgenetic alopecia
Answer: D: androgenetic alopecia 
Explanation: Androgenetic alopecia means loss of hair and thinning of hair in the fronto-temporal region- male patern hair loss. Nails are affected in Psoriasis, lichen planus, and fungal infection. Ref Harrison20th edition pg 1234