In a code language, 'dom kel sar' means 'clean fresh water', 'kel wu mi' means 'fresh fruit juice' and 'sar mi pla' means 'water and juice'. Which of these could be the code for 'clean air'?

Explanation

1. 01

   'fresh' is in the first two sentences: 'kel'. 'water' is in the first and third: 'sar'.

2. 02

   The first sentence then leaves 'dom' for 'clean'.

3. 03

   'air' appears in no sentence, so its code must be a code not used so far, such as 'tez'.

4. 04

   So 'clean air' could be 'dom tez'.