Surveying
Pick up the correct statement for horizontal photographs.

All listed here
The two sides of a road meet at the vanishing point
The lines parallel to the negative plane are projected as parallel lines
Parallel lines do not appear parallel in central projection

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Surveying
Dumpy level is most suitable when

All of these
many readings are to be taken from a single setting of the instrument
the instrument is to be shifted frequently
fly levelling is being done over long distance

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