Foreign Authors Chronological Order

This solution determines the correct chronological sequence of the given foreign authors based on their historical periods.

Identifying Author Time Periods

To establish the chronological order, we need to know the approximate time periods when each author lived and worked:

• (a) Ktesias (Ctesias): A Greek physician and historian who lived in the late 5th and early 4th centuries BCE (approx. 400 BCE).
• (b) Megasthenes: A Greek ethnographer and ambassador, known for his work on India. He lived around the late 4th and early 3rd centuries BCE (approx. 300 BCE).
• (c) Pliny: Refers to Pliny the Elder, a Roman author and naturalist. He lived from 23/24 CE to 79 CE.
• (d) Ptolemy: Refers to Claudius Ptolemy, a Greco-Roman mathematician, astronomer, and geographer. He lived approximately between 100 CE and 170 CE.

Determining Chronological Sequence

Arranging the authors from earliest to latest based on their time periods:

1. Ktesias (approx. 400 BCE)
2. Megasthenes (approx. 300 BCE)
3. Pliny the Elder (approx. 70 CE)
4. Ptolemy (approx. 150 CE)

This sequence corresponds to (a), (b), (c), (d).

Final Sequence Confirmation

The correct chronological sequence of the foreign authors is Ktesias, Megasthenes, Pliny, and Ptolemy.