To answer this question, you need to understand how XML (eXtensible Markup Language) describes data.
Option A) XML uses a description node to describe data - This option is incorrect. XML does not have a specific "description node" to describe data. Instead, XML uses tags to define the structure and content of the data.
Option B) XML uses a DTD to describe the data - This option is correct. XML can use a Document Type Definition (DTD) to describe the structure and content of the data. A DTD specifies the elements, attributes, and their relationships that are allowed in an XML document.
Option C) XML uses XSL to describe data - This option is incorrect. XSL (eXtensible Stylesheet Language) is not used to describe the structure or content of XML data. XSL is used to transform XML data into other formats or to apply styles and formatting to XML documents.
Option D) None of the above - This option is incorrect. The correct answer is option B, as XML uses a DTD to describe the data.
The correct answer is B) XML uses a DTD to describe the data. This option is correct because a DTD is a commonly used method in XML to describe the structure and content of the data.