On June 21, the Summer Solstice, the Northern Hemisphere is tilted towards the Sun, resulting in regions north of the Tropic of Cancer (23.5° N) experiencing prolonged sunlight. The Tropic of Cancer itself receives direct sunlight, ensuring more than 12 hours of daylight. Conversely, areas within the Arctic Circle (66.5° N) receive continuous daylight, experiencing 24 hours of sunlight due to the axial tilt. In contrast, the Tropic of Capricorn (23.5° S) and the Equator experience less than 12 hours of sunlight on this date, as they are located in the Southern Hemisphere or closer to it. Therefore, the correct answer is 2 and 4.