This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Viral infections, Subject name: Dental
Which of the following is NOT known to occur with more severity than usual in patients with HIV infection? 
Select and explain. 
A. Psoriasis, B. Ichthyosis, C. Norwegian scabies, D. Lichen planus
D: Lichen planus
Answer: D: Lichen planus 
Explanation: Patients with HIV infection have been repoed to develop a severe form of Norwegian scabies with hyperkeratotic psoriasiform lesions. Psoriasis and ichthyosis, although not repoed to be increased in frequency, may be paicularly severe when they occur in patients with HIV infection.