If 'HOUSE' is coded as '98765' and 'CAGE' is coded as '4321', what is the code for 'ECHO'?

Answer: B. 4321
The code for 'ECHO' can be derived from 'CAGE' by rearranging the letters, as 'E' corresponds to '4', 'C' to '3', 'H' to '2', and 'O' to '1'.