Which of the following lists three Russian submarine classes and their propulsion types?

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Multiple Choice

Which of the following lists three Russian submarine classes and their propulsion types?

Explanation:
The correct trio matches each Russian class with its actual propulsion: Borei-class submarines are nuclear-powered, Yasen-class submarines are nuclear-powered, and Varshavyanka is the diesel-electric variant of the Kilo-class. This combination is the only one where every class has the propulsion type that historically belongs to it. The other options mix propulsion types with classes incorrectly—for example, Kilo-class submarines are diesel-electric, Los Angeles-class are nuclear-powered, and Oscar-class submarines are nuclear-powered, not diesel-electric.

The correct trio matches each Russian class with its actual propulsion: Borei-class submarines are nuclear-powered, Yasen-class submarines are nuclear-powered, and Varshavyanka is the diesel-electric variant of the Kilo-class. This combination is the only one where every class has the propulsion type that historically belongs to it. The other options mix propulsion types with classes incorrectly—for example, Kilo-class submarines are diesel-electric, Los Angeles-class are nuclear-powered, and Oscar-class submarines are nuclear-powered, not diesel-electric.

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