Option C:  is the surface area of the prism
 is the surface area of the prism
Explanation:
Given figure is a triangular prism.
We need to determine the surface area of the triangular prism.
The formula to find the surface area of the triangular prism is given by

where b is the base of the triangle,
h is the height of the triangle,
 are the three sides of the triangle and
 are the three sides of the triangle and
H is the height of the prism.
Let us substitute the values  ,
 ,  ,
 ,  ,
 ,  ,
 ,  and
 and  in the formula, we get,
 in the formula, we get,

Simplifying, we get,

Multiplying the term, we get,

Adding the terms, we have,

Thus, the surface area of the prism is 
Hence, Option C is the correct answer.