The Advantages of Involute Profile Over Cycloidal Are Given Below

The advantages of involute profile over cycloidal are given below. Identify if there is any incorrect statement

A) In the involute system, the pressure angle is constant, from commencement to end of engagement
B) The vriation in the centre distance with in limits does not affect the two mating gears in the involute system
C) The straight teeth of the basic rank for the involute profile admits of simple tools
D) The interference is inherently absent in this system
E) The profile for the flank and face is a single curve in the involute system