उत्तर : 4. "ऑस्ट्रेलिया "
व्याख्या :

 In January 2022, Australia is the largest producer of bauxite in the world. Bauxite is the primary ore from which aluminum is extracted, and Australia has extensive bauxite deposits. However, production figures can change over time, so it's advisable to check the latest data for the most accurate information.