Choose the correct answer

__________ named the sea as Pacific Ocean as it was very calm.

Option (c) is correct because Ferdinand Magellan when passes through the ocean named it as Pacific Ocean due to its calmness.

Option (a) is incorrect because Columbus is credited for discovering America.

Option (b) is incorrect because Amerigo Vespucci, the Italian traveller is famous because America was named after his name.

Option (d) in incorrect because Vasco-da-gama is known for discovering sea route to India.