**Core Concept**
The differentiation between *Neisseria meningitidis* (meningococci) and *Neisseria gonorrhoeae* (gonococci) is crucial in clinical microbiology. This distinction is based on the unique characteristics of each species, including their growth requirements, biochemical reactions, and pathogenicity.

**Why the Correct Answer is Right**
Since the specific options are not provided, a general approach to differentiating these two pathogens involves considering their sugar fermentation patterns, such as maltose, sucrose, and glucose. Meningococci can ferment maltose and glucose, while gonococci can only ferment glucose.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we can't directly address its inaccuracy.
**Option B:** Similarly, option B's incorrectness depends on its content, which is not provided.
**Option C:** This option would be incorrect if it suggested a method that does not reliably distinguish between the two species.
**Option D:** The inaccuracy of option D would stem from its failure to account for a key differentiating characteristic.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that *Neisseria* species are gram-negative diplococci, and their identification often relies on biochemical tests and molecular techniques.

**Correct Answer:** Correct Answer: D. Maltose fermentation