What is true about the equinox?

The correct answer is Option (4) - An equal amount of daylight and darkness at all latitudes

There are only two times of the year when the Earth's axis is tilted neither toward nor away from the sun, resulting in a "nearly" equal amount of daylight and darkness at all latitudes. These events are referred to as Equinoxes. Equinox is the position of the Earth on 21st March and 23rd September. Both hemispheres experience equal days and nights. - On 21st March in the Northern hemisphere, this position is spring equinox.