GENERAL KNOWLEDGE

Detailed explanation-1: -Greenwich meridian, also called prime meridian, an imaginary line, last established in 1851, that was used to indicate 0° longitude. It passes through Greenwich, a borough of London, and terminates at the North and South poles. Because it indicated 0° longitude, it was also known as the prime meridian.

Detailed explanation-2: -What is the meridian line? The meridian line in Greenwich represents the Prime Meridian of the world, Longitude Zero (0° 0’ 0"). Every place on the Earth is measured in terms of its angle east or west from this line. Since 1884, the Prime Meridian has served as the reference point for Greenwich Mean Time (GMT).

Detailed explanation-3: -The recommendation was based on the argument that naming Greenwich as Longitude 0º would be of advantage to the largest number of people. As the reference for GMT, the Prime Meridian at Greenwich therefore became the centre of world time and the basis for the global system of time zones.