Okay, let's see. The user provided a question with options A to D and a correct answer, but the question itself is empty. Hmm, that's a problem. How can I explain the correct answer without knowing the actual question? Maybe the user made a mistake in copying the question. Without knowing the topic or the specific statements, I can't generate a proper explanation.

Wait, the user's instructions say that they want a thorough explanation based on the given question and correct answer. But since the question is missing, I can't proceed. I need to know what the question is about. Are the options related to a specific medical topic? Like pharmacology, anatomy, etc.?

I should inform the user that the question is missing. Let me check the original query again. Oh, the user included a placeholder with A, B, C, D but no actual statements. So the core issue is that the question isn't provided. Without the actual statements, I can't determine the core concept or explain why each option is correct or incorrect.

The user might have intended to provide a specific question but forgot to fill in the details. I need to point out that the question is incomplete. Since the user is expecting an explanation, but without the question content, it's impossible to proceed. I should respond by asking them to provide the complete question with the options and the correct answer so that I can help properly.

The provided question is incomplete and lacks the necessary statements (A-D) and context to generate an accurate explanation. Please provide the full question with the specific statements and options to proceed.

**Correct Answer: [Letter]. [Answer Text]**

✓ Correct Answer: B. Cox-I is an inducible enzyme