Correct Answer - Option 4 : Track
Explanation:
Track modulus:
(i) Track modulus is the index for stiffness or resistance to deformation of the permanent way. It is defined as the load per unit length of the rail required to produce unit deformation or depression in the track.
(ii) It depends on gauge distance, type of rails, type and density of sleepers and type of Ballast etc.
(iii) For computation of track modulus initial load taken for BG is 4 tonnes and for MG track is 3 tonnes.
