In Case of Gears the Pressure Angle Is

Multiple Choice

In case of gears the pressure angle is

A) The angle between the line of action and the common tangent to the pitch surface in the plane of rotation
B) The angle between the normal to the point of contact and the shaft axis
C) The angle between the normal to dedendum at the path point and tangent to the dedendum at the path point and tangent to the dedendum at the same point
D) The angle of obliquity between the tangent drawn at the point of contact of the two mating gears
E) None of the above