Ratio of upper anterior facial height to lower anterior facial height is:
(A) 55:45:00 (B) 60:40:00 (C) 40:60 (D) 45:55:00
(D) The ratio of upper anterior facial height and lower anterior facial height ratio is 45:55. It decreases with age.
N-Sn occupying 45% and  Sn-Gn 55% of the total height.