At what height should the centre of the headrest be?

At what height should the centre of the headrest be?
A)At neck height.
B)At eye level.Correct
C)The height of the headrest is irrelevant.
The headrest is an important passive safety element that can significantly reduce the likelihood of suffering cervical injuries. Its proper adjustment is vital, both in the front seats and in the rear ones:
- The upper edge of the headrest must be located between the top of the head and eye level.
- There should be no space between the driver's head and the headrest, or it should be as small as possible, never greater than 4 cm.