If each alternate letter beginning with the first in the word WORKJNG is replaced by the next letter in the English alphabet and each of the remaining letters is replaced by the previous letter in the English alphabet, which of the following will be the fourth from the right end after the replacement?

After replacing each alternate letter starting with the first in "WORKJNG" with the next letter in the alphabet and the remaining letters with the previous letter, the transformed word becomes XNSJKMH.

To find the fourth letter from the right end:

1. The rightmost letters of "XNSJKMH" are:
   • H (1st from right),
   • M (2nd from right),
   • K (3rd from right),
   • J (4th from right).

Thus, the fourth letter from the right end is J .