Geometry

Question Analysis  
This question assesses similarity of triangular prisms by checking base side ratios and height ratios.
The main focus is ensuring both the base triangle and the prism height scale uniformly.  

Key Concept Explanation  
For prisms to be similar, their base triangles must be similar (sides in proportion) and their heights must scale by the same factor as the base.  

Step-by-Step Solution  
1. Original prism’s base ratio:  
  Height = 6 cm  
2. Check options:  
  Option A:  
    Base sides = (scale factor = 2)  
    Height = cm → Similar  
  Option B:  
    Base sides = (not proportional to