The ________ declaration specifies which characters and

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The ________ declaration specifies which characters and delimiters may appear in the application.

1. SGML
2. XML
3. HTML
4. DTD
5. None of these

Correct Option: A

XML(Extensible Markup Language) and HTML(Hypertext Markup Language) are web markup language used to design and create web pages. The DTD defines the syntax of markup constructs. SGML (Standard Generalized Markup Language) is a standard for how to specify a document markup language or tag set. Such a specification is itself a document type definition (DTD). SGML is metadata.