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: Dental
Causes of erythroderma – a) Pityriasis albab) Pityriasis versicolorc) Psoriasisd) Lichen planuse) Eczema 
Select and explain. 
A. ab, B. cde, C. acd, D. bd
B: cde
Answer: B: cde 
Explanation: None