Aurora Australis pertaining to ionosphere are related to which hemisphere/region?

Correct option is C

The correct answer is: (c), Southern Hemisphere
Aurora Australis refers to the southern lights, a natural light display that occurs predominantly in the high-latitude regions of the Southern Hemisphere.
This phenomenon is caused by the interaction of charged particles from the solar wind with the Earth's magnetosphere, leading to the emission of light in various colors.
Information booster
Aurora – polar lights (auroras) are a natural phenomenon. In the north pole, it is called an aurora borealis or northern light. In the south pole, it is called aurora australis or southern lights.