What is the difference between antelope 'oryx' and 'chiru'?

• A. The oryx is adapted to live in hot and dry regions, while the chiru is adapted to live in cool high montane grasslands and semi-desert regions.
• B. Oryx is hunted for its adornments, while Chiru is hunted for musk.
• C. The oryx is found only in western India, while the chiru is found only in north-east India.
• D. neither of the above