|A) O||B) N|
|C) T||D) E|
Given word : CONTEXTUAL
After making changes as per given in the question , the above word becomes as follows:
XTUALCONTE . Hence, 4th letter from the right end is O.
Total no of letters in the given word = 10.
4th letter from the right means (10 - 4 + 1 =) 7th letter from the left of the word obtained after rearrangement. Again, read the question , we come to know that, the positions of the second and seventh letters are interchanged. Hence the required letter is the second letter of the given word which is O.