UGC NET Paper 1 GA 2017 Nov Solved Paper

Given below are two premises (a and b). From those two premises four conclusions (i), (ii), (iii) and (iv) are drawn. Select the code that states the conclusion/conclusions drawn validly (taking the premises singularly or jointly).
Premises :
(A) All bats are mammals.
(B) No birds are bats.
Conclusions :
(i) No birds are mammals.
(ii) Some birds are not mammals.
(iii) No bats are birds.
(iv) All mammals are bats. Codes :