aura is a word
If it is possible to make only one valid four-letter English word using the first, second, fourth and seventh letters of the word RAVENOUS exactly once, which of the following will be the first letter of that word? If no such word can be made, give X as the answer and if more than one such word can be made, give ‘Y’ as the answer.
The first, second, fourth and seventh letters of the word ‘RAVENOUS’ are R, A, E and U.
The only valid four-letter word that can be formed using these letters exactly once is UREA.
The first letter in UREA is U.