In letter coding type of questions, the real alphabets in a word are replaced be certain other alphabets according to a specific rule to form its code. The candidate is required to detect the common rule and answer the questions accordingly.
If in a code, ALTERED is written as ZOGVIVW, then in the same code, RELATED would be written as
Clearly, each letter of the word ALTERED is replaced by the letter which occupies the same position from the other end of the English alphabet, to obtain code.
Thus, A, the first letter of the alphabet, is replaced by Z, the last letter.
L, the 12th letter from the end.
T, the 7th letter form the end of the alphabet is replaced by G, the 7th letter from the beginning of the alphabet, and so on.
Similarly, in the word RELATED, R will be coded as I, (E as V), (L as O), (A as Z), (T as G) and (D as W).
Thus, the code becomes IVOZGVW.
Hence, the answer is (a).