What is the full form of SGML?

Explanation

Concept: Standard generalized markup language (SGML) is a text mark up language that serves as a superset of widely used markup languages like HTML (hypertext markup language) and XML (extensible markup language). SGML is used for marking up documents and has the advantage of not being dependent on a specific application Advantages of SGML They can be created by thinking in terms of document structure rather than appearance characteristics (which may change over time). They will be more portable because an SGML compiler can interpret any document by reference to its document type definition (DTD). Documents originally intended for the print medium can easily be re-adapted for other media, such as the computer display screen. Hence Option 4 is correct