Surveying
For adjusting a quadrilateral whose both the diagonals are observed, the equations of conditions involved, are

Three angle equations and one side equation
None of these
Two angle equations and two side equations
One angle equation and three side equations

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Surveying
In the prismatic compass

the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction
the line of the sight does not move with the box
the magnetic needle and graduated circle do not move with the box
the magnetic needle moves with the box

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