If all the even digits are changed to their succeeding digit and all the odd digits

Q. If all the even digits are changed to their succeeding digit and all the odd digits are changed to their preceding digit in the number series to form a new number in the same order and all the digits are written in ascending order from left to right, then in which of the following more than three digits remains unchanged?

I. 38968423

II. 95236478

III. 78965423

A.            Both II and III

B.            Only I

C.            Both I and III

D.            Only III

E.            None

Ans: None

I. 38968423
After interchanged and rearranging the digits:
29879532 → 22357899
II. 95236478
After interchanged and rearranging the digits:
84327569 → 23456789
III. 78965423
After interchanged and rearranging the digits:
69874532 → 23456789