Correct Answer - Option 1 : KAR
The logic followed here is:
In all words except option (1), the first and last letter are vowel while the middle letter is consonant.
Option1: The first and last letters are consonants and the middle letter is a vowel.
Option2: The first and last letters are vowels and the middle letter is a consonant.
Option3: The first and last letters are vowels and the middle letter is a consonant.
Option4: The first and last letters are vowels and the middle letter is a consonant.
Thus, KAR is not followed this logic, it is an odd one.
Hence, KAR is the correct answer.