The following best describes the difference between robotic process automation $($RPA$)$ and robotics:

$$ a$.$ RPA does not use robot that imitate human actions, while robotics involves physical hardware to imitate human actions

b$.$ RPA uses a robot that imitate human actions, while robotics involves physical hardware to imitate human actions

c$.$ RPA uses physical hardwate that imitate human actions, while robotics involves robot to imitate human actions

$$ d RPA uses robot that imitate human actions, while robotics does not involve physical hardware to imitate human actions