Which of the following ultra-violet radiation cause most skin disorder-
Cutaneous responses to uv radiation UVA -315-400nm immediate erythema Immediate pigment darkening- merowsky phenomenon drug induced photosensitivity photoageing UVB- 280-315nm 1000x more erythmogenic, associated with sunburn delayed melanogenogenesis major role in carcinogenesis role in photoageing role in vitamin d synthesis UVB has more damage to skin fitzpatrick textbook of dermatology page 267
UV-A
UV-B
UV-C
None
Photosensitive disorders