Rocher Mechanism includes the functioning of the following parts :
(i) Pinion wheel, Escapement wheel
(ii) Escapement wheel, loose dog
(iii) Pinion wheel, Segment slots
(iv) Loose dog, Platen.
AOnly (i) and (ii)
BOnly (ii) and (iii)
COnly (iii) and (iv)
DOnly (iv) and (i)