center to center of rails
running faces of rails
outer faces of rails
none of the above
only (i)
both (i) and (ii)
both (ii) and (iii)
(i), (ii) and (iii)
Broad Gauge
Meter Gauge
Narrow Gauge
any of the above
roaring rails
hogged rails
corrugated rails
buckled rails
wheel burns
hogging of rails
scabbing of rails
corrugation of rails