Okay, let's tackle this question about second-generation cephalosporins that can be taken orally. First, I need to recall the different generations of cephalosporins and their characteristics. Second-generation cephalosporins are known for having broader Gram-negative coverage than first-generation and some activity against Gram-positive bacteria. Examples include cefuroxime and cefprozil.

Now, the question is asking which of these can be used orally. I remember that cefuroxime is available in both oral and injectable forms. Cefprozil is another one that's oral. Wait, are there others? Let me think. Cefaclor and cefuroxime axetil are also second-gen and oral. But the options aren't given here, so I need to focus on the correct answer based on standard knowledge.

The correct answer is likely cefuroxime or cefprozil. Let me confirm. Cefuroxime axetil is a prodrug that's converted to cefuroxime. Both are second-gen and oral. Cefprozil is also second-gen and oral. So if the options include any of these, those would be correct. The common ones that are orally administered are cefuroxime axetil and cefprozil. Since the user hasn't provided the options, I'll proceed with the knowledge that the answer is cefuroxime axetil, which is a prodrug, or cefprozil. Wait, but the correct answer is probably cefuroxime axetil. Let me verify. Yes, cefuroxime axetil is a second-gen cephalosporin with oral bioavailability. Cefprozil is another one. However, in some contexts, cefuroxime (the active form) is available in oral form as well, like cefuroxime axetil. So the correct answer is cefuroxime axetil. Alternatively, cefprozil is also correct. But since the question is about which can be used orally, the answer is likely cefuroxime axetil or cefprozil. Given that the user's correct answer is to be filled, perhaps the intended answer is cefuroxime axetil. However, I need to make sure. Let me check standard references. Yes, cefuroxime axetil is a second-gen cephalosporin given orally. Cefprozil is also a second-gen oral cephalosporin. So the answer depends on the options given. Since the user hasn't provided the options, but the correct answer is to be filled, I'll proceed with the correct answer being cefuroxime axetil. Alternatively, if the options include cefprozil, then that's correct. But given that the user is expecting a specific answer, I'll go with cefuroxime axetil as the correct answer here.

**Core Concept**
Second-generation cephalosporins extend Gram-negative coverage compared to first-generation agents while retaining some Gram-positive activity. Oral formulations are prodrugs requiring activation in the body for bioavailability.

**Why the Correct Answer is Right**
Cefuroxime axetil is a prodrug of cef

✓ Correct Answer: C. Cefaclor