The formation width for a railway track depends on the i) type of gauge ii) number of tracks to be laid side by side iii) slope of sides of embankment or cutting The correct answer is A. only (i) B. both (i) and (ii) C. both (i) and (iii) D. (i), (ii) and (iii)

The correct answer is D. (i), (ii) and (iii).

The formation width for a railway track is the width of the area required to support the track and its superstructure. It depends on the following factors:

• Type of gauge: The gauge is the distance between the inside edges of the rails. The most common gauge is 1,435 mm (4 ft 8 1⁄2 in), but there are many other gauges in use around the world. The gauge affects the formation width because it determines the distance between the rails and the edge of the embankment or cutting.
• Number of tracks to be laid side by side: If there are multiple tracks to be laid side by side, the formation width will be wider than if there is only one track. This is because the tracks need to be spaced apart to allow for safe operation.
• Slope of sides of embankment or cutting: The slope of the sides of the embankment or cutting affects the formation width because it determines the amount of space required to support the track. The steeper the slope, the wider the formation width will need to be.

In addition to these factors, the formation width may also be affected by other factors such as the type of soil, the climate, and the level of traffic.