The following sentence contains slang: "Dance is fun and fantabulous" (B).
The slang word here is fantabulous. It is a portmanteau word, which means that it is the result of two words meshed together: fantastic and fabulous. From this you can guess the meaning. It is an adjective that describes something of spectacular quality.
It became a widespread pop culture term in London in the 1960s and 70s, and is still part of British slang to this day.
