Explanation
The evidence unearthed by a police sniffer dog falls under scientific evidence.
Police sniffer dogs are trained to use their highly developed sense of smell to detect various substances, such as narcotics, explosives, and human remains. They are used by law enforcement agencies across the world to detect and locate hidden or concealed objects, and the evidence obtained by them is considered scientific evidence.
Scientific evidence is the evidence obtained by using scientific methods, principles, and techniques. It includes physical evidence, such as fingerprints, DNA, and ballistics, as well as other types of evidence, such as the evidence obtained by using a sniffer dog. Scientific evidence is admissible in court, subject to certain conditions, and is considered more reliable and objective than other forms of evidence.
Hearsay evidence, on the other hand, is evidence that is based on the statement of another person and not on direct observation or knowledge. Oral evidence is the evidence given by a witness in the form of a statement or testimony.
Thus, the correct answer is B: Scientific Evidence.
