What is the efficiency of diesel cycle if γ and T denotes the specific heat ratio and temperature respectively?

• A. 1 – \(\frac{T4-T1}{T3-T2} \)
• B. 1 – \(\frac{T4-T1}{γ(T3-T2)} \)
• C. 1 – \(\frac{γ(T4-T1)}{T3-T2} \)
• D. 1 – \(\frac{T4-T1}{(γ-1)(T3-T2)} \)