Base of the tongue is attached to the:
Hyoid bone
Mandible
Hyoid bone and mandible
None of the above
The base of tongue constitutes the anterior wall of the oropharynx and can be inspected only by the use of a mirror or by a downward pressure on the tongue with a tongue spatula.
It is attached to the hyoid bone and mandible.
Reference: TEXTBOOK OF ANATOMY HEAD, NECK AND Brain, Volume III, second edition page no 191