The correct answer is option 1: 8°4`N and 37°6`N. This means that the latitudes of the mainland of India span from 8 degrees 4 minutes north to 37 degrees 6 minutes north. Latitude lines measure the distance north or south of the equator, with the equator itself being 0 degrees latitude. In this case, the latitudes mentioned indicate the northernmost and southernmost points of the mainland of India. It is important to note that latitude lines run horizontally across the Earth, so the values mentioned in the options represent the north-south extent of India`s mainland.