Option 1 states that all meridians run in a true north-south direction. This statement is correct because meridians are lines of longitude that run from the North Pole to the South Pole, forming a complete circle around the Earth.

Option 2 states that meridians are spaced farthest apart at the Equator and converge to common points at the poles. This statement is also correct because the Earth`s surface is round, and as the meridians move closer to the poles, they come together and eventually meet at the North and South Poles.

Option 3, the correct answer, states that all meridians are always parallel to one another. This statement is incorrect because meridians are lines of longitude that converge at the poles and are not parallel to each other.

Option 4 states that an indefinite number of meridians may be drawn on a globe. This statement is correct because meridians can be drawn at any interval around the Earth, allowing for an infinite number to be placed on a globe.

In conclusion, option 3 is the correct answer because meridians are not parallel to each other.