Which is the latest edition of Chicago Manual of Style?

The correct option is 17th edition.

The Chicago Manual of Style (CMOS) is a comprehensive guide to English style, usage, and grammar, widely used in academic and book publishing. Published by the University of Chicago Press, it has undergone periodic revisions since its first publication in 1906 to address changes in technology and publishing standards.

Here is the timeline of the recent editions of the Chicago Manual of Style:
1. The 15th edition was released in 2003.
2. The 16th edition was released in 2010.
3. The 17th edition was released in September 2017, bringing significant updates for citing digital media, online databases, social media posts, and electronic formats.

Based on the provided options and answer key, the 17th edition is designated as the correct latest edition.