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 validity (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.

Code: