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: Skin
Exposure to sunlight can precipitate : 
Select and explain. 
A. Chlosma, B. Discoid lupus erytyhematosus, C. Dermatitis herpatiformis, D. Lupus vulgaris
B: Discoid lupus erytyhematosus
Answer: B: Discoid lupus erytyhematosus 
Explanation: B i.e. Discoid lupus erytyhematosus - Photosensitive dermatitis (skin lesions) are lupus erythematosus (SLE, DLE, SCLE), porphyriasQ (erythropoietic/hepatoerythropoietic/ variegate porphyria, erythropoietic protoporphyria and porphyria cutaneatardaQ), psoriasis, pellagra, pemphigus, lichen planus (actinicus), and liver spots (lentigo senelis)Q. Morphea is localized form of scleroderma (systemic sclerosis). Calcinosis cutis is calcified lesions seen in scleroderma & dermatomyositis.