Three statements are given, followed by three conclusions numbered I. II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.
Statements:
1 All blazers are dungarees.
2 No dungaree is scarf.
3 All pyjamas are dungarees.
Conclusions:

I. No blazer is scarf.

II. No blazer is pyjama.

III. Some blazers are pyjamas.

I. No blazer is scarf. (True, All blazers are dungarees, it logically follows that no blazer is a scarf)

II. No blazer is pyjama. (False, There is no information suggesting that blazers and pyjamas cannot overlap within the category of dungarees)

III. Some blazers are pyjamas. (False, There is no information in the statements that establishes any overlap between blazers and pyjamas)

Thus, correct option is (b).