If V1 is the jet velocity and V0 is the vehicle velocity, then propulsive efficiency of a turbo-jet engine is

• A. <img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/350-192-1.png">
• B. <img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/350-192-2.png">
• C. <img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/350-192-3.png">
• D. <img src="/_files/images/mechanical-engineering/ic-engines-and-nuclear-power-plants/350-192-4.png">