The most popular mobile medical app function is

A. exercise programs.
B. general medical reference.
C. drug references.
D. billing information.
E. diagnostic support.

C. drug references.

Recent surveys indicate that information about prescription medications is the most popular use of mobile medical app functions. General medical references and exercise programs are also popular with consumers, and providers use mobile medical apps for diagnostic support and billing. As the mobile medical apps grow, other applications may become more popular.