Among the options given, the thermodynamic property that is a path function is : Option B : Work Path functions depend on the specific way that a system changes from one state to another. They are properties or quantities whose values depend on the transition path of the process rather than just the initial and final states of the system. Work (and also heat) fits this description because the amount of work done by or on a system can vary depending on the process path taken between two states. In contrast to path functions, state functions (or point functions) are properties that depend only on the state of the system and not on the path taken to reach that state. Internal energy (Option A), entropy (Option C), and enthalpy (Option D) are examples of state functions. Their changes are determined entirely by the initial and final states of a process and do not depend on the path taken to get from one state to another. Therefore, for any thermodynamic system that transitions from state 1 to state 2 , the change in a state function (like internal energy ∆U, entropy ∆S, or enthalpy ∆H ) is the same no matter what path is taken.