A levelling work was carried out along a falling gradient using a dump – McqOptions

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1.	A levelling work was carried out along a falling gradient using a dumpy level and a levelling staff of 3 m length. The following successive readings were taken: 1.155, 2.74, 0.75, 1.79 m. What is the correct order of booking the four readings in the field book? (BS: back sight, FS : fore sight, IS : intermediate sight)
A.	BS, IS, BS, FS
B.	BS, FS, IS, FS
C.	BS, IS, FS, BS
D.	BS, FS, BS, FS
Answer» E.

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