While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of levelling staff and cross hairs, the instrument is

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While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of levelling staff and cross hairs, the instrument is

ACorrectly focused

BNot correctly focused

CSaid to have parallax error

DFree from parallax error

Answer:

C. Said to have parallax error

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