JEE Main 1997 Mathematics question on Application of Derivatives

1. A.
   both $f(x)$ and $g(x)$ are increasing functions
2. B.
   both $f(x)$ and $g(x)$ are decreasing functions
3. C.
   $f(x)$ is an increasing function
4. D.
   $g(x)$ is an increasing function

[1997]