In a certain code, if 'CAT' is coded as '3120', 'DOG' is coded as '4157', how is 'FISH' coded?

Answer: A. 61489
The code represents the position of each letter in the alphabet: C(3), A(1), T(20) = 3120; D(4), O(15), G(7) = 4157; F(6), I(9), S(19), H(8) = 61489.