Question

which one of the following is not a line of demarcation between two countries​

Answer 1

Plimsoll line is not a line of demarcation between two countries instead it is used in ships to show the water level.

Explanation:

• It is used as a reference sign that is drawn on the hull of the ship, it shows how deep the vessels can safely go into the water when a cargo ship is loaded.

• This line differed from ship to ship depending on the size and dimensions of the ships also what type of cargo is to be transported and time of the year along with the water density.

Answer 2

The line which is not of demarcation between two countries is International Date Line.

• The International Date Line (IDL) is a line on the Earth's surface which is imaginary line from north to the south pole, demarcating from one calendar day to another.
• The line travels through the center of the Pacific Ocean, approximately matching the longitude of 180 ° but it deviates from going through certain regions and groups of islands.