Concrete lining is provided concurrently with the driving operation in case of Options: A . &nbsprock terrain B . &nbspsoft rock C . &nbsprunning soil D . &nbspnone of these.

Concrete lining is provided concurrently with the driving operation in case of

Question

Concrete lining is provided concurrently with the driving operation in case of

Options:

A . rock terrain

B . soft rock

C . running soil

D . none of these.

Answer: Option A
Answer: (a).rock terrain

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