Step 1: Analyze the key elements of the definition.
The definition has two parts: (1) a statement given by a person, and (2) it can be used against him in court. This implies an admission of guilt.
Step 2: Define the options.
Information: A general term for any facts provided. It is not necessarily an admission of guilt.
Complaint: An allegation made to a Magistrate that some person has committed an offense. It is an accusation against someone else.
Writ: A formal written order issued by a court.
Confession: A statement made by a person accused of a crime, in which they admit to having committed the offense. It is a direct acknowledgment of guilt and is the most powerful piece of evidence that can be used against the person who made it.
Step 3: Match the definition to the term.
The description perfectly fits the legal definition of a Confession.