What constitutes perjury?

• A. Lying about one's identity in court.
• B. Knowing false testimony under oath that is material to the case.
• C. Making a guess about the outcome of a case.
• D. Providing testimony that is truthful but not relevant.

Answer: (B)

Perjury is knowingly making a false statement under oath about a fact that matters to the case. The crucial points are: the statement is made while under oath, the person knows it’s false (intent to mislead), and the falsehood concerns something material to the proceeding. That combination captures why the described choice is the correct one. A guess about how a case will turn out isn’t presenting a factual assertion under oath, and truthful but irrelevant testimony isn’t lying. Lying about identity could be perjury if it’s a false statement under oath about a material fact, but the core concept centers on knowingly false testimony that matters to the case.