During a levelling work along a falling gradient using a Dumpy level and a Staff of 3m length, following successive readings were taken: 1.785, 2.935, 0.360, 1.320. What will be the correct order of booking these four readings in a level book? (BS : Back Sight IS : Intermediate Sight, FS : Fore Sight)

During a levelling work along a falling gradient using a Dumpy level a

1.	During a levelling work along a falling gradient using a Dumpy level and a Staff of 3m length, following successive readings were taken: 1.785, 2.935, 0.360, 1.320. What will be the correct order of booking these four readings in a level book? (BS : Back Sight IS : Intermediate Sight, FS : Fore Sight)
A.	BS, FS, BS, FS
B.	BS, IS, FS, FS
C.	BS, IS, IS, FS
D.	BS, IS, BS, FS
Answer» B. BS, IS, FS, FS

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