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.

Code: