The question asks us to match the railway zones (List-I) with their respective headquarters (List-II) and select the correct answer using the provided code.

List-I contains the names of the railway zones: East Central, North Eastern, Northeast Frontier, and North Western.

List-II contains the names of the headquarters of these railway zones: Gorakhpur, Jaipur, Hajipur, and Maligaon.

Taking a look at the options:

Option 1: It states that the headquarters for East Central is Gorakhpur, which is incorrect. The correct headquarters for East Central is Hajipur. Therefore, option 1 is incorrect.

Option 2: It states that the headquarters for East Central is Hajipur, which is correct. It also correctly matches the headquarters of the other railway zones. Therefore, option 2 is the correct answer.

Option 3: It incorrectly matches the headquarters of East Central and North Eastern railway zones. Therefore, option 3 is incorrect.

Option 4: It correctly matches the headquarters of East Central and Northeast Frontier railway zones. However, it incorrectly matches the headquarters of North Eastern and North Western railway zones. Therefore, option 4 is incorrect.

In conclusion, the correct answer is option 2.