How many books are there in the Tur?

The Tur, or "Arba'ah Turim," is a foundational work of Jewish law written by Rabbi Jacob ben Asher in the early 14th century. It is divided into four main sections, which correspond to different areas of Jewish law: Orach Chayim (daily living and prayer), Yoreh De'ah (dietary laws and other ritual laws), Even Ha'ezer (marital law), and Hoshen Mishpat (civil and tort law). This division into four books is significant as it organizes Jewish law in a way that is both comprehensive and accessible, making it a crucial resource for Halachic practice.

This understanding of the structure of the Tur clarifies why the correct answer is that it contains four books. The other choices do not reflect the actual division of the text, as the Tur is distinctively recognized for its four-part structure, which is not found in two, three, or five segments. The clarity and organization provided by these four sections allow for easier study and application of Halacha in various areas of life.