When a system is taken from state i to a state f along path iaf, \[Q=50\,J\] and \[W=20J.\] Along path ibf, \[Q=35J.\] If \[W=-13J\] for the curved return path f i, Q for this path is [AMU (Med.) 2000]

• A.            33 J
• B.            23 J
• C.            ? 7 J                                         
• D.            ? 43 J