A 40 year old farmer with a history of recurrent attacks of porphyria

A 40 year old farmer with a history of recurrent attacks of porphyria complains of itching when exposed to the sun and maculopapular rash on sun-exposed areas. His symptoms are exaggerated in the summer. The diagnosis is


a) Seborrheic dermatitis 
b) Contact dermatitis  
c) Psoriasis  
d) Porphyria cutanea tarda


Ans (d)