Final answer:
The coronal suture is indicated by the letter B. It joins the frontal bone to the right and left parietal bones.
Step-by-step explanation:
The coronal suture can be identified by the letter B. The coronal suture runs from side to side across the skull, joining the frontal bone to the right and left parietal bones. It is one of the two suture lines seen on the top of the skull, along with the sagittal suture.