H. influenzae has been isolated from the CSF of a 2 year old boy suffering from meningitis. The strain is beta lactamase producing and resistant to chloramphenicol, The most appropriate antimicrobial is

**Core Concept**
The question requires knowledge of antibiotic resistance patterns, particularly in the case of H. influenzae meningitis. The production of beta-lactamase enzymes by H. influenzae makes it resistant to beta-lactam antibiotics, such as ampicillin and amoxicillin. Additionally, the resistance to chloramphenicol limits the treatment options for this patient.

**Why the Correct Answer is Right**
The most effective treatment for beta-lactamase-producing H. influenzae meningitis is cefotaxime or ceftriaxone, which are third-generation cephalosporins. These antibiotics are not affected by beta-lactamase enzymes and have good penetration into the cerebrospinal fluid (CSF). Cefotaxime and ceftriaxone are considered the drugs of choice for the treatment of H. influenzae meningitis in children.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided.
* **Option B:** This option is also not provided.
* **Option C:** This option is also not provided.

**Clinical Pearl / High-Yield Fact**
In cases of bacterial meningitis, especially in children, it is essential to consider the antibiotic resistance patterns of the causative organism when selecting the most appropriate treatment.

**Correct Answer:** C. Cefotaxime.

✓ Correct Answer: C. Third generation cephalosporin