SSC JE Civil 16 Nov 2022 Shift 1 Solved Paper

Which of the following statements are true with respect to working from whole to part?
i. Major control points are established first with higher precision and then the minor control points are established using less precision.
ii. Major control points are established first with higher precision and then the minor control points are established using higher precision too.
iii. Errors are minimised.
iv. Less number of instruments are required for surveying.