A schizophrenic patient who falsely believes that he is Jesus Christ is experiencing

A) a delusion.
B) a hallucination.
C) a mirage.
D) flat affect.

Delusion

A strongly held belief that contradicts reality or rational argument, often a symptom of psychiatric disorders.

Believes

Believes refers to accepting something as true or real, often without tangible proof, based on trust, faith, or confidence in a person, idea, or statement.

Jesus Christ

A central figure in Christianity, regarded by Christians as the incarnate son of God and the savior of humanity.