Telangana PSC Group 2 Prelims 2016 Paper 1

Directions : in the following question there are two statements followed by four conclusions. You have to take the two given statements to be true, even if they seem to be at variance from commonly known facts and then decide which of the given conclusion/conclusions logically follow/follows from the two given statements, disregarding commonly known facts.
Statements : (A) All lions are dogs.
                       (B) Some dogs are tigers.
Conclusions : (I) Some lions are tigers
                         (II) Some dogs are lions.
                         (III) No lion is a tiger.
                         (IV) All dogs are lions.