Correct option is D
Given: AID, BAD, CAT, DOG, EAT
Now, change each letter of the given words to the next letter in the English alphabetical order:
AIDBJE (1 vowel)
BADCBI (1 vowel)
CATDBU (1 vowel)
DOGEPH (1 vowel)
EATFBU (1 vowel)
So, in the above-formed words, there is no such word formed that has no vowel in it.
Thus, the correct answer is (d).