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
A 40 year old woman presents with a 2 year old h/o erythematous papulo pustular lesions on convexities of the face. There in a background of erytherma & telengiec-tasia. The most likely diagnosis is: 
Select and explain. 
A. Acne valgaris, B. Rosacea, C. SLE, D. Polymorphic light eruption
B: Rosacea
Answer: B: Rosacea 
Explanation: B i.e. Rosacea