American method of tunnelling (i) Is suitable for large sized tunnels (ii) Is no

Question

American method of tunnelling (i) Is suitable for large sized tunnels (ii) Is not suitable for railway or highway tunnels (iii) Requires heavy timbers

Options:

A . Only (i) is correct

B . (i) and (iii) are correct

C . (ii) and (iii) are correct

D . (i) and (ii) are correct

Answer: Option A

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