Who was the first navigator who had sailed around the earth and proved that the shape of earth is round?
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James Cook
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Ferdinand Magellan
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Ptolemy
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Vasco da Gama
B
Correct answer
Explanation
Ferdinand Magellan led the first expedition that successfully circumnavigated the Earth (1519-1522), proving that Earth is round. Although Magellan himself was killed in the Philippines in 1521 during the voyage, his crew continued and completed the circumnavigation under Juan Sebastián Elcano. James Cook came much later, Ptolemy believed in geocentric model, and Vasco da Gama reached India by sea but didn't circumnavigate. Magellan's expedition provided practical proof of Earth's spherical shape.