Which of the following statements related to lines of latitude is not correct?

1. They are called parallels of Latitude.
2. They are used to determine time.
3. They are important to determine climate.
4. Equator is the largest line of latitude.

Meridian means

1. Midnight
2. Midday
3. Morning
4. Dusk

The difference between IST & GMT is

1. 6 hours
2. 4 hours 30 minutes
3. 5 hours 30 mins
4. 12 hours

Which of the following statement about Great circle is true?

1. All the parallels are Great circles.
2. Navigators find it difficult to follow the route of Great circle.
3. Equator & all the meridians are Great circles.
4. All the above.