The correct answer is option 2, The National Commission for Scheduled Tribes.

Article 338A of the Indian Constitution pertains to the establishment of a National Commission for Scheduled Tribes. This commission is responsible for ensuring the welfare and protection of the rights of Scheduled Tribes in India.

Now let`s examine the other options to understand why they are not the correct answers:

Option 1, The National Commission for Scheduled Castes, is related to Article 338 of the Indian Constitution. This commission is responsible for the welfare and protection of the rights of Scheduled Castes.

Option 3, The National Commission for Backward Classes, does not have any specific mention in the Indian Constitution. However, there is a provision for a National Commission for Backward Classes under Article 338B.

Option 4, The National Commission for Women, is related to Article 15 of the Indian Constitution, which prohibits discrimination against any citizen on the grounds of religion, race, caste, sex, or place of birth. The commission is responsible for safeguarding women`s rights and promoting gender equality.

In conclusion, the correct commission related to Article 338A is The National Commission for Scheduled Tribes.