The formula for the area of a circle is

 where  represents the radius,

The radius is half the diameter.  Since the diameter is 19,
the radius is half that or 

Substituting:




 square inches, or as a decimal 
So it isn't any of the choices you gave.  Maybe you mistyped and 
meant the circumference.  If so, then the formula for the
circumference is 



 inches

So if you meant circumference then that is a choice; however
the unit for circumference is just plain 'inches', not 'square
inches'.  You'll have to ask your teacher what was meant, because
as it is the problem is botched.

Edwin