what is difference between Rational Rose and rational rhapsody
One answer
Rational Rose is a legacy product that supported UML1.x and is likely not supported any more. The successor was https://en.wikipedia.org/wiki/Rational_Software_Modeler
Rational Rhapsody is a modeling tool that is especially designed for embedded and systems development, has a lot more code generation and is actually still supported. It supports SysML modelling
There is this place called internet, where you can actually find all this information e.g. in the wikipedia: