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  5. Biology in Human Welfare

Railways General Science & Technology Biology in Human Welfare Sample Paper Biology in Human Welfare Sample Test Paper-34

  • question_answer
    Vinegar is prepared from alcohol with the help of

    A)  Lactobacillus    

    B)  Acetobacter

    C)  Azotobacter      

    D)  Rhizobium

    Correct Answer: B

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