The correct answer is (a) Section 130.
Section 130 of the Indian Evidence Act states that an accomplice is a competent witness against an accused. An accomplice is a person who is guilty of the same offence as the accused, or of an offence which is a necessary part of the offence charged against the accused, or of an offence which is a probable consequence of the commission of the offence charged against the accused.
Section 130 of the Indian Evidence Act is important because it allows accomplices to testify against each other. This can be helpful in cases where there is no other evidence available, or where the evidence is weak. However, it is important to note that accomplice testimony is not always reliable, and should be considered carefully by the court.
The other options are incorrect because they do not state that an accomplice is a competent witness against an accused. Section 131 of the Indian Evidence Act states that a person who is an accused is not a competent witness against himself. Section 132 of the Indian Evidence Act states that a person who is an interested witness is not a competent witness. Section 133 of the Indian Evidence Act states that a person who is an incompetent witness is not a competent witness.