Read the following statements about great circles and select the option that is true.

Assertion [A]: Great circles are highly useful for navigation.

Reason [R]: They represent the longest distance between two points on a sphere.

Both A and R are true. R provides the correct explanation for A.

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Both A and R are true. R provides the incorrect explanation for A.

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A is true but R is false.

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Both A and R are false.

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Solution

The correct option is C A is true but R is false.
A great circle is the largest circle that divides a sphere into two halves. The equator is the only great circle of the Earth. It shows the shortest path between two points on the Earth. Thus, sailors and pilots use great circles to adjust their routes while travelling over long distances.

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