A word of three letters can be formed using third, seventh and tenth letters of the word SOPHISTICATED. What will be the middle letter of that word. If no word can be formed 'X’ is your answer, if two words can be formed 'Y' is your answer, and if three words can be formed ‘Z’ is your.
1) A
2) X
3) Y
4) Z
5) None of these

Explanation

4