40. The work of Ptolemy which was used by Christopher Columbus as the map of the world was: A. "The Great Treatise B. "Mathematical Treatise C. "Apotelesmatika" D. "Tetrabiblos" E. "Geography

Option E.

Explanation:

Geography, is the right answer.

Written around AD 150 by Claudius Ptolemy, the Geography is an atlas, a gazetteer and treatise on cartography, organizing the cartographic principles of the 2nd-century Roman Empire. Columbus used this work as a world map. However, during the course of time, he revised this geography farther by using 53⅔ Italian naval miles as the measure of a standard rather the higher degree of Ptolemy.