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  1.  

    Pick up the correct statement from the following :
    2. A.

    The horizontal angle between magnetic meridian and true meridian at a place is called magnetic declination or variance of the compass
    B.

    the imaginary lines which pass through points at which the magnetic declinations are equal at a given time are called isogonic lines
    C.

    the isogonic lines through places at which the declination is zero are termed agonic lines
    D.

    all the above.

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    Answer : Option D

    Explanation :

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