ageism

Ain't funny pickin' on the old students (yes, this was a real question).

A 45-yr old medical student, having failed year after year, was stressed out about the upcoming exam and developed scaly papules and vesicles only on the sides of the fingers.  A biopsy showed spongiosis and lymphocytes.  The most likely diagnosis is:

A. pemphigus
B. urticaria
C. dyshidrotic eczema
D. tinea versicolor
E. candidiasis