Autoimmune disease overview systemic lupus erythematosus sle

Which of the following statements regarding the dermatological manifestations of lupus erythematosus is true?

1: A malar butterfly rash may present months to years before systemic symptoms
2: Immunofluorescence of a lupus skin lesion will reveal IgG antibodies against desmogleins
3: Lupus erythematosus does not affect the hair follicles
4: Moderate ultraviolet (UV) light exposure can improve cutaneous SLE lesions