B.
.
The volume of the given object = ![125\ cm^3](/tpl/images/1009/5266/d1e6f.png)
Explanation:
Given : Dimensions of an object : 5 cm x 5 cm x 5 cm [ it is a cube with all equal sides]
Formula to find the volume of a cube = ![(side)^3](/tpl/images/1009/5266/e3a20.png)
![=5^3\ cm^3=125\ cm^3](/tpl/images/1009/5266/9e774.png)
Hence, the volume of the given object = ![125\ cm^3](/tpl/images/1009/5266/d1e6f.png)
Therefore , the correct option is B.
.