Surveying
The point at which sun's declination changes from north to south, is known as

First point of Aeries
Vernal Equinox
First point of Libra
Both (B) and (C) of the above

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Surveying
The cross hairs in the surveying telescope are placed

much closer to the objective lens than to the eye piece
much closer to the eye-piece than to the objective lens
anywhere between eye-piece and objective lens
midway between eye piece and objec-tive lens

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