What is the difference between quarantining viruses and removing viruses?

Question $3$ options:

a$)$

Removing the viruses is not as safe as quarantining the viruses; therefore, it is preferred.

b$)$

Quarantining a virus can only be done on a Windows Operating System.

c$)$

There is no difference between the two actions.

d$)$

Quarantined viruses are not removed from the device.