Option b is the correct answer. Natural History is a work by Pliny the Elder, a Roman author and naturalist who lived in the first century CE.Ptolemy was a different Roman author and astronomer who lived in the second century CE and wrote the Almagest, a treatise on astronomy and mathematics Important Tips Facts about various literature: Life of Hiuen Tsang is a biography of the Chinese Buddhist monk and traveler by his disciple Hui-li. Historial Philippical is a history of the world by the Roman historian Pompeius Trogus; The Histories is a work of ancient Greek history by Herodotus, often called the father of history.