Suppose all the animals in the cage are chickens: there should be $$2\times 32=64$$ legs. However, $$90-64=26$$ legs are missing because we counted $$26\div2=13$$ rabbits as chickens. Hence, there are $$13$$ rabbits and $$32-13=19$$ chickens. 
A total of $$32$$ chickens and rabbits are caged together. If there are $$90$$ legs in total, how many chickens and rabbits are in the cage, respectively? 
(A) $20$; $12$ 
(B) $13$; $19$ 
(C) $18$; $14$ 
(D) $19$; $13$ 