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If each vowel in the word DREAMS is changed to the letter following it in the English alphabetical order and each consonant is changed to the letter following it in the English alphabetical order and the set of letters thus arrived are then rearranged in English alphabetical order, then which of the following letters will be fourth from the right in the group of letters thus formed?
F
N
E
S
F
Apply the transformation rule directly to each letter, sort the resulting set, and count from the right side (where 4th from right is equivalent to 3rd from left for a 6-letter word).
Apply the transformation rule directly to each letter, sort the resulting set, and count from the right side (where 4th from right is equivalent to 3rd from left for a 6-letter word).
Apply transformation to each letter
Word: DREAMS. D (Consonant) тЖТ E (+1), R (Consonant) тЖТ S (+1), E (Vowel) тЖТ F (+1), A (Vowel) тЖТ B (+1), M (Consonant) тЖТ N (+1), S (Consonant) тЖТ T (+1). Resulting set: {E, S, F, B, N, T}.
Rearrange letters in alphabetical order
The set {E, S, F, B, N, T} arranged in alphabetical order becomes: B, E, F, N, S, T.
Find the fourth letter from the right
The sequence is B (1st), E (2nd), F (3rd), N (4th), S (5th), T (6th). Counting from the right (T is 1st, S is 2nd, N is 3rd, F is 4th). The 4th letter from the right is F.
B is wrong because it corresponds to the 1st position; E is wrong because it is the 2nd position; N is wrong because it is the 3rd position from the right (4th from left).
A is correct because after transforming DREAMS to ESFBNT and rearranging to BEFNST, the letter F occupies the 4th position when counting from the right (T=1, S=2, N=3, F=4).
Always verify if the question asks for 'from the left' or 'from the right' to avoid simple index errors; for 6 letters, 4th from right is the same as 3rd from left.
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