If 'APPLE' is coded as '13524', 'BANANA' as '214321', and 'GRAPE' as '71524', what is the code for 'A'?

Answer: B. 2
The letter 'A' appears in 'BANANA' and is coded as '2'. It also appears in 'APPLE' but is coded differently. The consistent code for 'A' across the words is '2'.