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
Commonest cutaneous eruption in systemic L.E. is: 
Select and explain. 
A. Palmar erythema, B. Discoid lesions, C. Erythema of light exposed area, D. Diffuse morbiliform erythema
C: Erythema of light exposed area
Answer: C: Erythema of light exposed area 
Explanation: Erythema of light exposed area