Answer:
Option d.
Explanation:
Lines of longitude run from North to South and are called Meridians
In a Geographical sense, meridians refer to great circles which intersect each other at the North and the South Poles.
Therefore,
Longitudes are also known as meridians.
The line drawn from north to south at 0 degrees is known as the prime meridian that divides Earth into two parts: the Eastern Hemisphere and the Western Hemisphere
So,
Option d. is correct