The correct answer is option 'B', Tropic of Cancer.

Explanation:

The Tropic of Cancer is an imaginary line that circles the Earth at approximately 23.5 degrees north latitude. It is one of the five major lines of latitude that mark the Earth's position relative to the Sun.

1. Tropic of Cancer:
- The Tropic of Cancer is located at approximately 23.5 degrees north latitude.
- It is called the Tropic of Cancer because when the Sun reaches its highest point in the sky during the summer solstice (around June 21st), it appears to be directly overhead at this latitude.
- This latitude marks the northernmost point on the Earth where the Sun's rays can be directly overhead at noon.
- The Tropic of Cancer divides the Earth into two hemispheres: the Northern Hemisphere and the Southern Hemisphere.

2. Northern Hemisphere:
- The Northern Hemisphere is the half of the Earth that lies north of the Equator.
- It includes countries such as the United States, Canada, Russia, China, and most of Europe.
- The Tropic of Cancer is located in the Northern Hemisphere, specifically at approximately 23.5 degrees north latitude.

3. Other Tropics:
- The Tropic of Capricorn is located at approximately 23.5 degrees south latitude, in the Southern Hemisphere.
- The Equator is an imaginary line located at 0 degrees latitude and divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
- The Tropic of Cancer and the Tropic of Capricorn are the two major lines of latitude that mark the furthest points north and south where the Sun's rays can be directly overhead.

Conclusion:
The correct answer is option 'B', Tropic of Cancer, because it is the imaginary line located at approximately 23.5 degrees north latitude in the Northern Hemisphere.