If the positions of the third and tenth letters of the word 'DOCUMENTATION' are interchanged, and likewise the position of the fourth and seventh letters, the second and sixth letters, is also interchanged, which of the following will be eleventh letter from the right end ?

Correct Answer: T
  C) T

The new letter sequance is D E T N M O U T A C I O N 

Clearly the eleventh letter is T