In a coding system, 'RIVER' is coded as '1892218'. What is the code for 'WATER'?

A. 23121920

In a code language, 'FISH' is represented as '7890'. What is the code for 'BIRD'?

C. 2341

If 'FLOOR' is coded as '6151518', what is the code for 'DOOR'?

C. 41518

If 'APPLE' is coded as '12345', and 'ORANGE' is coded as '678910', what is the code for 'LEMON'?

A. 34567

If 'APPLE' is coded as '12345', what is the code for 'LEMON' if 'L' is 12, 'E' is 5, 'M' is 13, 'O' is 15, and 'N' is 14?

C. 1251315