Explanation:

- Defence witness (Option 1): A witness called by the defense to support its case.

- Prosecution witness (Option 2): A witness called by the prosecution to provide evidence against the defendant.

- Hostile witness (Option 3): A witness who has turned against the party who called them, providing testimony that contradicts that party's position. This term applies when the witness is uncooperative or hostile.

- Court witness (Option 4): A neutral witness called by the court to provide information on a specific issue.

Hostile witness (Option 3): This describes a witness turning contrary to the original party’s case.