The correct answer is option 'D', Greenwich.

**Explanation:**

The Prime Meridian is an imaginary line that divides the Earth into the Eastern Hemisphere and the Western Hemisphere. It is the starting point for measuring longitude and is used as a reference point for determining the time zones around the world.

The Prime Meridian passes through Greenwich, a borough in London, United Kingdom. It was established by Sir George Airy in 1851 and is officially recognized as the Prime Meridian by the International Meridian Conference held in 1884.

Here are some key points to support this answer:

1. **Location of Greenwich:** Greenwich is located in southeast London, near the banks of the River Thames. It is known for its historical significance and is home to the Royal Observatory Greenwich, which is the location of the Prime Meridian.

2. **Royal Observatory Greenwich:** The Royal Observatory Greenwich is a scientific institution that played a crucial role in the development of navigation and astronomy. The Prime Meridian passes through the courtyard of the observatory, marked by a brass strip and a line on the ground.

3. **International Meridian Conference:** In 1884, representatives from 25 countries met in Washington D.C. for the International Meridian Conference. The purpose of the conference was to establish a standard Prime Meridian that would be recognized internationally. After much discussion and debate, it was agreed that the Prime Meridian would pass through Greenwich.

4. **Greenwich Mean Time (GMT):** Greenwich is also the reference point for measuring time zones around the world. Greenwich Mean Time (GMT) is the mean solar time at the Prime Meridian. It was widely adopted as the standard time by countries around the world and served as the basis for the development of Coordinated Universal Time (UTC).

In conclusion, the Prime Meridian passes through Greenwich, a borough in London, United Kingdom. It was officially established as the Prime Meridian during the International Meridian Conference in 1884 and is recognized as the starting point for measuring longitude and time zones globally.

Greenwhich