Down’s cephalometric analysis of a patient reveals a high mandibular plane angle. Which of the following landmarks are used for the construction of the mandibular plane in this analysis?

Tweed and Ricketts- straight line tangent to the lower most border of the mandible. Downs- line joining Gonion to menton. Steiner- line joining Gonion to gnathion. Bimler’s line- line joining menton to antegonial notch. Ref: Radiographic cephalometry:Jacobson A