When thermodynamic system returns to its original state, which of the following is NOT possible?

When heat is added to a system, which of the following is not possible ?

The mutation which returns to the original state is called

The mutation which returns to the original state is called

The mutation which returns to the original state is called

When heat is added to a system at constant temperature, which of the following is possible.

When heat is added to a system then the following is not possible?

When you exercise in the morning, by considering your body as thermodynamic system, which of the following is true?

What is a thermodynamic system ? What are it’s types ?