Which of the following represents Otto cycle on temperature - entropy (T - s) diagram?

• A. <img src="/_files/images/mechanical-engineering/thermodynamics/251-214-1.png">
• B. <img src="/_files/images/mechanical-engineering/thermodynamics/251-214-2.png">
• C. <img src="/_files/images/mechanical-engineering/thermodynamics/251-214-3.png">
• D. <img src="/_files/images/mechanical-engineering/thermodynamics/251-214-4.png">