If it is possible to make only one meaningful English word with the third, the sixth, the eighth and the eleventh letters of the word COMPUTERISED using each letter only once in the word, last letter of the word is your answer. If no such word can be formed, your answer is 'X’ and if more than one such word can be formed, your answer is ‘Z’.
1) M
2) T
3) R
4) X
5) Z

Explanation

1