During an equinox, where do the Sun's vertical rays strike?

During an equinox, the Sun's vertical rays strike the equator. This phenomenon occurs twice a year, around March 21 (the vernal equinox) and September 23 (the autumnal equinox), when day and night are approximately equal in length across the globe. At this time, the Earth’s position relative to the Sun allows for sunlight to hit the equator directly, which results in similar amounts of daylight and darkness for most places on Earth.

The Tropic of Cancer corresponds to the northernmost point where the Sun can be directly overhead, occurring during the summer solstice around June 21. Conversely, the Tropic of Capricorn is the southernmost point for direct overhead sunlight, reached during the winter solstice around December 21. Thus, during equinoxes, the focus is on the equator, making it the correct point for the Sun's vertical rays.

The choice of "None of the above" incorrectly implies that the correct answer does not exist among the provided options, when, in fact, the equator is the key location struck by the Sun's rays during an equinox.