<prompt> If the distance between the tip of tongue and insertion of lingual frenum is 6 mm, then it will be:Mild ankyloglossiaModerate ankyloglossiaSevere ankyloglossiaComplete ankyloglossia  <response>: Class 1 - Mild ankyloglossia - 12-15 mmClass 2 - Moderate ankyloglossia - 8-11 mmClass 3 - Severe ankyloglossia - 4-7 mmClass 4 - Complete ankyloglossia - 0-3 mm. 