The answer is option 'B' - Concurrent forces.

Concurrent forces are forces that act on the same point or concurrent point. These forces have different magnitudes and directions, but they have a common point of application. When concurrent forces act on a body, they have a resultant force and a resultant moment. The resultant force is the vector sum of all the forces acting on the body, while the resultant moment is the vector sum of the moments caused by each force.

Non-concurrent forces are forces that do not have a common point of application. They have different points of application and can act at different angles and distances from each other. Non-concurrent forces can be parallel or non-parallel.

Rotation and forces
When forces act on a body, they can cause both translational motion and rotational motion. Translational motion refers to the linear movement of the body, while rotational motion refers to the spinning or turning motion of the body around an axis.

Concurrent forces and rotation
Concurrent forces do not cause rotation because their lines of action pass through the same point or are concurrent. Since the forces act along the same line, they produce a net force but no net moment about that point. This means that the forces do not create a turning effect or torque on the body, resulting in no rotation.

Non-concurrent forces and rotation
On the other hand, non-concurrent forces can cause rotation. When non-concurrent forces act on a body, their lines of action do not pass through the same point. As a result, they create a net moment or torque about a particular axis, leading to rotation.

Conclusion
In conclusion, the correct answer is option 'B' - Concurrent forces. Concurrent forces do not cause rotation because their lines of action pass through the same point, resulting in no net moment or torque. Non-concurrent forces, on the other hand, can cause rotation as their lines of action do not pass through the same point, creating a net moment or torque.