Answer: a
Proper Syntax but poor Semantic.
Step-by-step explanation:
This state Colorless green ideas sleep furiously is a sentence by Noam Chomsky written in his book in the year 1957 titled Syntactic Structures. It is an example of a sentence that is correct grammatically but a nonsense semantically. Although the sentence is grammatically correct, it has no understandable meaning, thus it demonstrates the difference between syntax and semantics. As an example of a category mistake, it was used to show the inadequacies of certain grammar(probabilistic models of grammar) and the need for more structured models of grammar.