The correct answer is: C. Truth : Lie
Identity is the state of being who or what a person or thing is. Anonymity is the state of being unknown or unacknowledged.
Flaw is a defect or imperfection. Perfection is the state of being without flaw or defect.
Careless is not taking care or attention. Mistake is an error or blunder.
Fear is an unpleasant emotion caused by the belief that someone or something is dangerous, likely to cause pain or harm. Joy is a feeling of great pleasure and happiness.
The relationship between identity and anonymity is that identity is the state of being known, while anonymity is the state of being unknown. The relationship between truth and lie is that truth is the state of being accurate or factual, while lie is the state of being false or inaccurate.
The other options do not have the same relationship as the original pair of words. Flaw and perfection are not opposites, as they can both exist in the same person or thing. Careless and mistake are not opposites, as a person can be careless without making a mistake. Fear and joy are not opposites, as a person can experience both fear and joy at the same time.