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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

Answer: Option A