In Case of Gears, the Interference Takes Place

Multiple Choice

In case of gears, the interference takes place

A) Whenever the forms of the mating teeth are such that contact between them can occur at some place other than along the correct path of contact
B) When gears do not move smoothly in absence of lubrication
C) When the pitch of the gears is not same
D) When the gear teeth are under cut
E) None of the above