Answer 1

HTML has different standards like HTML3, HTML4, HTML5 etc. and with each new version there are certain changes and improvements.
HTML3 is kind of outdated now, HTML4 is said as HTML generally, and HTML5 is the newest standard on which you should focus the most.
So, HTML5 is same but with some more features and improvements.

Answer 2

Psyche Kindly use the search bar before posting ..
https://www.sololearn.com/Discuss/1840319/?ref=app
https://www.sololearn.com/discuss/1290033/?ref=app

Answer 3

Html5 is new version of Html

Answer 4

HTML is old version and HTML5 is latest
It has certain changes and improvements