In a coding scheme, 'FISH' is coded as '6148', 'HAT' as '218', and 'BAT' as '213'. What is the code for 'HATF'?

Answer: A. 2186
From the codes, 'H' is '2', 'A' is '1', 'T' is '8', and 'F' is '6'. Thus, 'HATF' is coded as '2186'.