Answer:
B). Rotational Motion
Step-by-step explanation:
When a block is sliding down on the inclined plane
Then due to the flat edges we will assume here that it is moving in a straight line without toppling
Now in that case the movement of the block will be in the to and fro type with small amplitude which is taken as vibrational motion
Also since it is moving in a straight line so we can say it is also showing translational motion
So the only possibility that it will not show is the Rotational motion due to its straight edges