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    Question

    Cryogenic engines are primarily used in which

    field?
    A Submarine propulsion Correct Answer Incorrect Answer
    B Rocket technology Correct Answer Incorrect Answer
    C Frost-free refrigerators Correct Answer Incorrect Answer
    D Washing machines Correct Answer Incorrect Answer

    Solution

    Cryogenic engines, which operate using extremely cold fuel, are a critical component in modern rocket technology, particularly for launching spacecraft.

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