number series questions

If it is possible to make a meaningful word with the 2nd, 6th 9th and 12th letters of the word ‘CONTRIBUTION’, which of the following will be the last letter of that word If more than one such word can be formed, give ‘M’ as the answer and if no such word can be formed, give ‘X’ as the answer ?

Answer : B. O

Answer : B. 102

Answer : E . 51

Answer : C. 192

Answer : D . 120