Patent fingerprints are created when which of the following substances come in contact with hands?

Patent fingerprints are visible imprints left on a surface when substances that are liquid in nature come into contact with a person's skin and then transferred to another surface. This type of fingerprint can be easily seen without further enhancement, as the liquids provide a clear and distinct mark.

When discussing the creation of patent fingerprints, substances such as blood, ink, or other liquids are particularly relevant because they can leave a strong imprint, facilitating clear visual identification. The liquids fill in the ridges and valleys of the fingerprint patterns, making it easy to see and analyze.

While other substances such as oils, moisture from skin, dirt, and grime can create latent fingerprints or smudges, they do not produce visible imprints in the same way that liquids do. Therefore, the most accurate choice involves the transfer of liquid substances, which leads to the formation of patent fingerprints that are readily observable.