Correct option is B
Given: PAINTER
Each vowel is changed to the nearest consonant succeeding it.
Vowels:
A → B
I → J
E → F
Consonants:
Each consonant is changed to the nearest vowel succeeding it.
P → U
N →O
T → U
R →U
After transforming, the new group of letters:
B, J, F, U, O, U, U
Identifying the letter repeated thrice:
U appears thrice in the new group of letters.
Thus, the correct option is (b) U.