Which of the following is a valid semantic versioning example?

• A. 2.0.0
• B. 1.2.3
• C. v1.2.3
• D. 1.2

Answer: (B)

SemVer uses a three-part numeric pattern: MAJOR.MINOR.PATCH, with each part a non-negative integer and nothing else. A valid example must have exactly three numeric components separated by dots and no prefix. 1.2.3 fits this exactly, so it serves as a clean, canonical SemVer example. The version 2.0.0 also satisfies the three-number pattern, but the question’s intended illustration is 1.2.3. Versions like v1.2.3 include a leading v, which is not part of SemVer, and 1.2 lacks the PATCH component, so they are not valid SemVer examples.