The correct answer is option 2, the Tropic of Cancer. The Tropic of Cancer is an imaginary line that runs horizontally across the globe at approximately 23.5 degrees north of the equator. It marks the northern boundary of the tropics – the region between the Tropic of Cancer and the Tropic of Capricorn.

In the case of India, the Tropic of Cancer passes through its central region, dividing it into the northern and southern parts. The northern part of India lies above the Tropic of Cancer, while the southern part lies below it.

The Equator, option 1, is an imaginary line that runs horizontally around the Earth, dividing it into the Northern Hemisphere and Southern Hemisphere. It does not specifically divide India into northern and southern parts.

The Tropic of Capricorn, option 3, is another imaginary line located approximately 23.5 degrees south of the equator. It divides the Earth`s southern region. India is not divided by the Tropic of Capricorn.

The Arctic Circle, option 4, is located in the extreme northern part of the Earth, encircling the North Pole. It does not pass through India and has no relevance to the division of the country.

So, the Tropic of