Which of the following areas did silk route not pass through

A. Western Africa is the correct answer.

Explanation: Silk roads were land routes that connected Southeast Asia and East Asia with South Asia, Arabian peninsula, Persia , southern Europe and East Africa. It got its name from the silk trade that was carried out on these routes. It began during the Han rule in China ( 207 BC -220 CE ). The central Asian section of the route was expanded by Han dynasty by sending missions under Zhang Qian, explorations and conquest. They even extended the Great Wall of China to ensure the security of their trade products, Silk road also played important role in development of the civilisation in Japan, Korea, China, Asia and Africa.