This question requires identifying the correct statements about the renowned linguist Noam Chomsky.

Chomsky's Linguistic Contributions

We need to evaluate each statement regarding Noam Chomsky's work:

• Statement (a): He called himself a Cartesian linguist. Chomsky's linguistic theories were heavily influenced by the philosophy of René Descartes, particularly the concept of innate mental structures. He viewed his work as aligning with Cartesian rationalism, making this statement largely accurate.
• Statement (b): He analyzed syntax. The study of syntax (the structure of sentences) is a fundamental aspect of Chomsky's research. His work revolutionized the understanding of sentence formation and grammatical structure. This statement is correct.
• Statement (c): He wrote about transformational grammar. Transformational grammar, also known as transformational-generative grammar, is Chomsky's most famous theoretical framework. It proposes rules that transform basic sentence structures into more complex ones. This statement is correct.
• Statement (d): He developed an artificial language called 'Yerkish'. The artificial language 'Yerkish' was created by Dr. Steven Dyer for the movie "Close Encounters of the Third Kind". It is not associated with Noam Chomsky's work. This statement is incorrect.

Conclusion on Statements

Based on the analysis, statements (a), (b), and (c) accurately describe aspects of Noam Chomsky's significant contributions and intellectual lineage. Statement (d) is factually incorrect.

Selecting the Correct Option

The correct combination of true statements is (a), (b), and (c). This corresponds to the first option provided.