The correct answer is (b) Hearsay Evidence.
Hearsay evidence is not admissible in court because it is not considered to be reliable. Hearsay evidence is a statement made by someone other than the witness who is testifying in court, and it is offered to prove the truth of the matter asserted in the statement. For example, if a witness testifies that they heard someone else say that the defendant committed the crime, this would be hearsay evidence.
The Indian Evidence Act, 1872, does not allow hearsay evidence to be admitted in court unless there is an exception to the rule. One exception is if the declarant is unavailable to testify. Another exception is if the hearsay evidence is relevant and reliable.
Oral evidence is evidence that is given by a witness in court. This type of evidence is often considered to be the most reliable type of evidence, because the witness is able to be cross-examined by the opposing party.
Primary evidence is evidence that is the original document or object. For example, if a witness is trying to prove that a contract was signed, the original contract would be considered primary evidence.
Expert evidence is evidence that is given by an expert witness. An expert witness is someone who has special knowledge or experience in a particular area. Expert witnesses are often called to testify in court cases involving complex issues.
I hope this helps! Let me know if you have any other questions.