The South Pole is the end point for all lines of longitude -- as is the North Pole -- so all lines meet at both poles.
The South Pole is located on the Antarctic continent.
As Antarctica is located at one of the poles, it covers every line of longitude; the only one of the continents to do do.
Every line of longitude passes through both the North and South Poles, which are located on the continent of Antarctica.
Antarctica. The South Pole is at 90 degrees S latitude. The North Pole is at 90 degrees N latitude. All lines of longitude converge at both poles.
Europe, Africa and Antarctica (as well as every other line of longitude).
Every line of longitude intersects with every line of latitude and vic-versa.
The question is confusing. Antarctica is counted among the continents, so any point you specify in Antarctica is on the Antarctic continent. And in that regard, I must also remark that your description of the places you're referring to is none too clear either. It's not correct to describe a place as being "210 degrees longitude line".
The 210 degrees longitude line passes through the continent of North America.
Europe, Africa, and Antarctica.
The 150 degrees west longitude line runs through the continent of Antarctica.
Every line of longitude forms a great circle.
Every line of constant latitude intersects every possible longitude, and vice-versa.
The Prime Meridian is a longitude line, made up of all the points that have zero longitude and every latitude.