The correct answer is option-2, which states that sunrise in eastern Arunachal Pradesh would be about two hours before the sunrise in western Gujarat.

The reason behind this time difference is the geographical location and the time zones. Arunachal Pradesh is located in the easternmost part of India, while Gujarat is located in the western part. India has a time difference of approximately two hours between these two regions.

India has a single time zone, known as Indian Standard Time (IST), which is based on the longitude of 82.5°E. This means that the country follows the same time throughout, despite the significant east-west span.

Since Arunachal Pradesh is situated further east of Gujarat, it experiences sunrise earlier due to being in a more easterly time zone. Therefore, sunrise in eastern Arunachal Pradesh occurs approximately two hours earlier than in western Gujarat.

So, option-2 is the correct choice as it accurately represents the time difference between the sunrise in the eastern and western regions of India.