Which one of the following is the correct description of a certain part of a normal human skeleton?
1. First vertebra is axis which articulates with the occipital condyles
2. The 9^th and 10^th pairs of ribs are called the floating ribs
3. Glenoid cavity is a depression with which the thigh bone articulates
4. Parietal bone and the temporal bone of the skull are joined by a fibrous joint