Farm Power

For the same compression ratio $r$ and heat input, the theoretical thermal efficiencies of air-standard cycles follow the order:

Options:

• (A) $\eta_{\text{Otto}} > \eta_{\text{Dual}} > \eta_{\text{Diesel}}$
• (B) $\eta_{\text{Diesel}} > \eta_{\text{Dual}} > \eta_{\text{Otto}}$
• (C) $\eta_{\text{Dual}} > \eta_{\text{Otto}} > \eta_{\text{Diesel}}$
• (D) $\eta_{\text{Otto}} = \eta_{\text{Diesel}} = \eta_{\text{Dual}}$