CONCEPT: The question tests on the basics of Coordinate Geometry

SOLUTION:
 

Given: (x1,y1)=(2,1)
(x2,y2)=(-3,4)

Slope for (x1,y1) and (x2,y2) = (y2-y1)/(x2-x1)
= [4- 1)]/[-3-(-2)]
 = -3/5 (OPTION C)