1 of the 5 two-word combinations shown below does not have the same word property as the other 4. Which one? Why?
Note: The answer has nothing to do with the number of: letters, vowels, consonants or syllables. It has nothing to do with meaning of the words or whether a particular letter/s is present or missing.
1 Commercial space
2 Cancun Mexico
3 Special vaccine
4 Focaccia slice
5 Oceanic places