<prompt> According to Pederson difficulty index, what is the difficulty level of an impacted toothwhich is lying horizontally, at Level III and position C?Minimum difficultyModerate difficultyVery difficultNot impacted  <response>: Pederson difficulty index based on Pell and Gregory classification:A Spatial relationship:Mesioangular 1Horizontal 2Vertical 3Distoangular 4B Depth:Position A highest portion of crown of 8 is above occlusal line of 2nd molar 1Position B higher portion of crown of 8 is above CEJ of 2nd molar 2Position C highest portion of crown of 8 is below CEJ of 2nd molar 3C Relation with ascending ramus:Level 1 mesiodistal width between 7 and ascending ramus is sufficient to accommodate mesiodistal width of 8 1Level 2 space slightly short to accomodate the entire mesiodistal width of 8 2Level 3 space very less to accomodate the entire mesiodistal width of 8 tooth almost within ascending ramus 3Difficulty score ABCScore 3-4 minimum difficultyScore 5-7 moderate difficultyScore 8-10 very difficult.Other difficulty indices are: WHARFE Score, Parant and Modified Parant scale and using WAR lines. 