Which one of the following is the largest coal producing centre of Ukraine?

1. A

   Zaporizhzhia

   Zaporizhzhia claims a major industrial and energy hub status in southern Ukraine. However, it is primarily known for heavy engineering and the Zaporizhzhia Nuclear Power Plant rather than being the country's largest coal producer.

2. B

   Kharkiv

   Kharkiv claims significance as a major machine-building and educational center in northeastern Ukraine. It plays a vital role in industrial manufacturing but does not hold the title of the largest coal producing centre.

3. C

   Donetsk

   Donetsk claims the position of the largest coal producing centre of Ukraine, located in the prominent Donbas coal basin. This region has historically been the heartland of Ukraine's coal mining and heavy metallurgical industries, making this the correct option.

4. D

   Kyiv

   Kyiv claims importance as the capital and administrative heart of Ukraine. While it is the political and cultural center of the nation, it is not a major coal mining hub.

Summary. Official key is (c) Donetsk. The question asks to identify the largest coal producing centre of Ukraine among the given options. Zaporizhzhia, Kharkiv, and Kyiv serve vital administrative, nuclear, and engineering functions rather than leading in coal extraction. Donetsk, situated within the rich Donbas basin, historically drives the nation's coal output. Therefore, option (c) is the correct choice.