Q
Which of the following errors cannot be eliminated by taking both face observations ?
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A
A. Error due to horizontal axis not being perpendicular to the vertical axis
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B
B. Index error i.e. error due to imperfect adjustment of the vertical circle vernier
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C
C. Error due to non-parallelism of the axis of telescope level and line of collimation
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D
D. None of the above
Correct Answer:
D. D. None of the above
