Which of the following statement is false?
(a) Context free language is the subset of context sensitive language
(b) Regular language is the subset of context sensitive language
(c) Recursively ennumerable language is the super set of regular language
(d) Context sensitive language is a subset of context free language
This question was posed to me in a national level competition.
My question is from Context Free Grammar-Derivations and Definitions topic in chapter Context Free Grammars and Languages of Automata Theory