If each vowel of the word $WEBPAGE$ is substituted with the next letter of the English alphabet,and each consonant is substituted with the letter preceding it,which of the following letters will appear thrice?

Find which one word cannot be made from the letters of the given word: $TEACHERS$.

Number of letters skipped in between adjacent letters in the series decreases by one. Which of the following series is observing the rule?

If it is possible to make a meaningful word from the second,the third,the tenth,and the eleventh letters of the word $PASSIONATELY$ using each letter only once,the second letter of that word is your answer. If no such word can be formed,your answer is $X$,and if more than one word can be formed,your answer is $Y$.

Study the letter series given below and answer the question that follows:
$H, D, Y, S, M, W, N, B, Q, P, O, C, R, T, B, L, Z, V, E, G, U, F$
Which is the only letter that occurs twice?

Find which one word cannot be made from the letters of the given word.
$CHOREOGRAPHY$