Consider the following statements about the choice of tunnelling method in soft strata?
(i) It depends on nature and type of soil.
(ii) It is independent of size of tunnel.
(iii) It depends on availability of equipment.
Which of the above statements is/are correct?
1
Only (i)
2
(i) and (iii) only
3
(ii) and (iii) only
4
(i), (ii) and (iii)