Explanation:

The correct option is 2:  fifth.
 As of 2020, India produced about 729 million tonnes of coal. However, it is a fact that domestic production is not able to meet the demand for coal in the country. India imported 247 million tonnes of coal last year and spent 1.58 lakh crore as foreign exchange.
• Despite India being the world's second-largest coal producer and being the 5th largest country in terms of coal deposits, with coal reserves that may last at least 100 years more, the country is unable to produce adequate quantity of coal to meet the requirement of domestic industry and development.