If 'RAT' is coded as '987' and 'BAT' is coded as '654', what is the code for 'TAB'?

Answer: C. 654
The letters 'T', 'A', and 'B' correspond to the codes from 'BAT', where 'B' is '6', 'A' is '5', and 'T' is '4', resulting in '654'.