The correct answer is: 5.
A track machine is a type of heavy machinery that is used to build and maintain railways. It is typically equipped with a large blade or bucket that is used to move earth and other materials. A camping coach is a type of railway car that is used to provide accommodation for track workers.
The Indian Railways has a set of rules and regulations that govern the movement of track machines and camping coaches. These rules are designed to ensure the safety of both the track workers and the general public.
One of these rules states that, in case of movement from one station to another station, up to 5 track machines with one camping coach each shall be allowed under one authority to proceed. This rule is in place to ensure that the movement of track machines does not disrupt the normal flow of traffic on the railway tracks.
The other options are incorrect because they do not comply with the Indian Railways’ rules and regulations.