UPSC General Studies Solved Paper - General Studies-2013

  • question_answer
    Consider the following organisms.
    1. Agaricus                   
    2. Nostoc     
    3. Spirogyra                              
    Which of the above is/are used as biofertiliser(s)?

    A)  1 and 2

    B)  Only 2    

    C)  2 and 3           

    D)  Only3

    Correct Answer: B


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