Which one of the following is the correct statement?
In meshing gears with involutes gear teeth, the contact begins at the intersection of the
(a) line of action and the addendum circle of the driven gear
(b) line of action and the pitch circle of the driven gear
(c) addendum circle of the driver gear and the addendum circle of the driven gear
(d) addendum circle of the driver gear and the pitch circle of the driven gear