An electrojet is an electric current which travels around the E region of the Earth's:

Answer: [C] Ionosphere

An electrojet is a streaming movement of charged particles in the lower ionosphere. Ionosphere is a region of Earth's upper atmosphere, extending from about 60 km to 1,000 km altitude. Electrojets are mainly found at altitudes between 100 to 150 km.

This question is a part of GKToday's Integrated IAS General Studies Module