Correct option is B
(I) All rings are earrings.
(II) Some rings are chains.
(III) All chains are bangles.

II. Some earrings are bangles (True, Since rings are a subset of earrings, and some rings are bangles, it follows that some earrings (specifically, those which are rings and bangles) are bangles.)
III. Some chains are earrings (True, according to diagram)
All conclusions I, II and III follow.