CGPSC Prelims Paper II 2019 Solved Paper

Direction: In the question below are given two statements followed by three conclusions i, ii, iii and iv. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statement :
All AC are DC.
Some DC are EC. 
All EC are YY.
Conclusion :
i) Some AC are EC.
ii) Some YY are DC
iii) No AC is EC.
iv) All DC are AC.