The correct order of inefficiencies for Otto, dual and diesel cycles is ?

Question

For the same values of peak pressure, peak temperature and heat rejection, the correct order of efficiencies for Otto, dual and diesel cycles is                                                                                                                                                     

      (a) $\eta$_otto > $\eta$_dual > $\eta$ _Diesel

      (b) $\eta$ _Diesel > $\eta$_dual > $\eta$_otto

      (c) $\eta$_dual > $\eta$ _Diesel > $\eta$_otto

      (d) $\eta$ _Diesel> $\eta$_otto\ $\eta$_dual