Which of the following is a scan result type explicitly mentioned for TruDefender results?

• A. Similar Match
• B. Exact Match
• C. Noise Detected
• D. Unidentified

Answer: (A)

In spectral library matching like TruDefender, results are categorized by how closely the measured spectrum matches a reference in the library. A Similar Match is used when the spectrum resembles a known threat closely but isn’t an exact fingerprint. This signals a high likelihood that the substance is in the library, even though there may be small variances due to sample condition, instrument factors, or environmental effects. Because this category is explicitly listed in the TruDefender result types, it best fits the description in the question. The other possibilities describe different situations—an Exact Match would be a perfect fingerprint, Noise Detected means the signal is dominated by noise, and Unidentified means there isn’t enough information to assign a known library hit.