For B.G. single track, the section of the tunnel must have a width

1.	For B.G. single track, the section of the tunnel must have a width
A.	4.2 m to 4.5 m
B.	4.5 m to 4.8 m
C.	4.9 m to 5.5 m
D.	5.5 m to 5.8 m
Answer» D. 5.5 m to 5.8 m

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For B.G. single track, the section of the tunnel must have a width

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