Let $h = g \circ f$ Then And $f ( 2 ) = 4$

Multiple Choice

Let $h = g \circ f$ Then and $f ( 2 ) = 4$ , $f ^ { \prime } ( 2 ) = \frac { 1 } { 2 }$ and $g ^ { \prime } ( 4 ) = 10$ Then $h ^ { \prime } ( 2 )$ is

A) 40
B) 20
C) 10
D) 5
E) 2