The position(s) of how many letters will remain unchanged if each of the letters in the word ALTERING is arranged in reverse English alphabetical order?

Given: ALTERING

Word: A L T E R I N G
Position: 1 2 3 4 5 6 7 8

English letters in reverse: Z, Y, X, ..., A

Letters in ALTERING = A, L, T, E, R, I, N, G
Sorted in reverse = T, R, N, L, I, G, E, A

There is zero letter which remain unchanged.

Thus, the correct option is (b) Zero.