Which of the following is not a category of form in art?

a. representational art

c. realistic art

b. abstract art

d. objective art

The correct answer is letter D. objective art. Art itself has three types, in terms of visual arts. That covers representational art (or realistic art), abstract art and the nonrepresentational art (or non-objective art). Nevertheless, the type of medium used can might be affect the art form of that specific art.