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

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

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Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a levelThe correct answer is

both (i) and (iv)
both (ii) and (iii)
only (i)
only (iii)

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