Answer:
B.
Step-by-step explanation:
Given,
The number of smaller cubes =
So, the number of cubes that have no coloured faces. = ,
Note : If a cube painted outside having side n is split into n³ cubes, then the volume volume that is not painted = (n-2)³
Thus, the remaining cubes that have been painted red on at least one of their faces
= Total cubes - cubes with no painted face
Hence, OPTION B is correct.