4.
If it is possible to make a meaningful word with the first, the third, the fifth, the tenth and the twelfth letters of the word THEORETICALLY, using each letter only once, which letter will be the third letter of that meaningful world? If no such word can be formed mark ' X' as your answer and if two such words can be formed mark ' XX' as your answer. If three such words can be formed mark 'XXX' as your answer and if more than three such words can be formed give 'XXXX' as your answer