In a mixed number coding system, 'RAT' is coded as 25, 23, 24 and 'MAT' is coded as 26, 24, 25. What is the code for 'BAT'?

Answer: B. 21, 19, 20
The coding indicates a decrement of 2 for each letter. Thus, 'BAT' is coded as 21, 19, 20.