For laying the railway track, materials required are__________________?

i) volume and nature of traffic
ii) speed of train
iii) physical features of the country
The correct answer is ?
A. only (i)
B. both (i) and (ii)
C. both (ii) and (iii)
D. (i), (ii) and (iii)

A. 1 in 257
B. 1 in 357
C. 1 in 457
D. 1 in 512

A. carbon and silicon
B. manganese and phosphorous
C. carbon and manganese
D. carbon and sulfur

A. stop
B. proceed
C. proceed cautiously
D. none of the above

A. less than 2 mm/m
B. more than 2 mm/m
C. less than 4 mm/m
D. more than 4mm/m

A. CST-9 sleeper
B. steel trough sleeper
C. wooden sleeper
D. concrete sleeper