The two meridians which can from a great circle are

a. 0° and 360°
b. 180° E and 180° W
c. 115° E and 140° E
d. 90° E and 90° W

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Solution

The correct answer is option (a).

Explanation: The two meridians that form a circle are at 0° and 360°. As we know that great circles are the largest circles that can be drawn on the globe, 0° and 360°, which divide the Earth into two equal halves, will form the great circle.

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