The correct option is option 3, which states that regions 2 and 3 are considered to be semi-arid.

To better understand this, let`s examine each option:

Option 1 suggests that only region 1 (North-Eastern Madhya Pradesh) is considered semi-arid. However, this is not accurate as region 1 is not mentioned in the correct answer.

Option 2 suggests that only region 2 (South-Western Andhra Pradesh) is considered semi-arid. While this is partially correct, it overlooks region 3, which is also considered semi-arid.

Option 3 correctly states that both region 2 (South-Western Andhra Pradesh) and region 3 (Saurashtra) are considered semi-arid. This aligns with the correct answer.

Option 4 suggests that only region 3 (Saurashtra) is considered semi-arid. Although this is true for region 3, it omits region 2, which is also considered semi-arid.

Therefore, the correct answer should be option 3: 2 and 3.