Pick up the correct statement from the following:

• The line which connects a number of parallel tracks, and also provides an access to main track, is called a gathering line
• With a diagonal gathering line, the length of the siding decreases with increase of its distance from main track
• To have sidings of same length, a diagonal line is laid at one end and a parallel gathering line at the other end
• For most economical layout of yards, the gathering lines are laid at the limiting angle
• All the above.