Which of the following is true about lines of longitude?

1. They run parallel to the Prime Meridian.
2. They are full circles
3. They are 360 lines at 1° interval.
4. All of the above.

The distance between two lines of longitude is maximum at which latitude?

1. Tropic of Cancer
2. North Pole
3. Equator
4. Arctic circle

What is Standard Time?

1. Uniform time based on a central meridian.
2. Time at 0° longitude
3. Time at 82°30'E
4. Time at 7½° longitudes at 12 noon.

Which of the following is true about the International Date Line?

1. It goes zig-zag at two points.
2. The date changes as one moves across it.
3. It is opposite the Prime Meridian.
4. All of the above.