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The R.L. of the line of collimation when the instrument is correctly levelled is called
S.
F.S.
H.I.
M.S.L
H.I.
Practice and solve "The R.L. of the line of collimation when the instrument is correctly levelled is called..." for Civil - Surveying. The correct answer is Option C: H.I.. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(c) **