This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Psoriasis, Subject name: Skin
Oil drop sign of nail is seen in? 
Select and explain. 
A. Lichen planus, B. Dermatophytes, C. Lupus vulgaris, D. Psoriasis
D: Psoriasis
Answer: D: Psoriasis 
Explanation: Ans. (d) PsoriasisRef: Lippincott's Primary Care Dermatology p 47, Bar an and Dawber's Disease of the Nails ad their Management by Robert Baran, David A. R. de Berker, Mark Holzberg, Luc Thomas ch-6