This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Erythroderma, Subject name: Skin
Erythroderma is seen in all except - 
Select and explain. 
A. Drug hypersensitivity, B. Pityriasis rubra pilaris, C. Pityriasis rosea, D. Psoriasis
C: Pityriasis rosea
Answer: C: Pityriasis rosea 
Explanation: Ans. is 'c' i.e., pityriasis rosea Causes of Erythroderma1) Skin disorders - Psoriasis, eczema/dermatitis (atopic, stasis,contact, seborrheic), Pityriasis Rubra Pilaris, Lichen Planus)2) Systemic diseases - cutaneous T- cell lymphoma3) Drugs - Gold, allopurinol, phenytoin, penicillin, sulphonamide4) Idiopathic - secondary to solid tumors of lung, liver, prostate, thyroid, colon