For isothermal expansion of an ideal gas, the correct combination of the thermodynamic parameters will be

For an isothermal expansion of an ideal gas, the correct combination of the thermodynamic parameters will be-

For an isothermal expansion of an ideal gas

For an isothermal expansion of an ideal gas

For the isothermal expansion of an ideal gas

In an isothermal expansion of an ideal gas

For isothermal free expansion of an ideal gas-