2

4

5

6

web of rail

fishing plane

head of rail

foot of rail

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