The formation width for a railway track depends on the

i) type of gauge

ii) number of tracks to be laid side by side

iii) slope of sides of embankment or cutting

The correct answer is

- 1
  
  only (i)
- 2
  
  both (i) and (ii)
- 3
  
  both (i) and (iii)
- 4
  
  (i), (ii) and (iii)

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