What is the distance between Accra, latitude 5°30N and latitude 51°30N?

During the equinoxes?

A. there are 6 hours of darkness and 18 hours of daylight in the Northern Hemisphere B. there is complete darkness for 24 hours at the North pole C. there is continuous daylight for 24 hours at the south pole D. day and night are equal in length for all places...

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