A 40-year-old woman presents with a 2-year history of erythematous papulopustular lesions on the convexities of the face.

A 40-year-old woman presents with a 2-year history of erythematous papulopustular lesions on the convexities of the face. There is a background of erythema and telangiectasia. The most likely diagnosis in the patient is:
1 Acne vulgaris.
2 Rossacea.
3 Systemic lupus erythematosus.
4 Polymorphic light eruption.