Which of the following statements about latent heat for a given substance is/are correct ? 1. It is fixed at a given temperature. 2. It depends upon the temperature and volume. 3. It is independent of temperature and volume. 4. It depends on the temperature but independent of volume. Select the correct answer using the code given below :

- Latent heat is the energy absorbed or released during a phase change at constant temperature and pressure. - Statement 1 accurately reflects that for a specific phase transition at standard conditions, the latent heat value is constant at the transition temperature. - While the phase change occurs at a constant temperature, the value of the latent heat can technically vary with the pressure, which in turn affects the transition temperature. Statement 4 might be interpreting "depends on the temperature" as being specific to the transition temperature value, and "independent of volume" in the sense that the volume of the substance isn't a variable determining the latent heat value itself, unlike say, specific heat capacity which can be defined at constant volume.