**Core Concept**
The Mini-Mental Status Examination (MMSE) of Folstein is a widely used screening tool for cognitive impairment and dementia. It assesses various cognitive functions, including arithmetic, memory, and orientation.

**Why the Correct Answer is Right**
The MMSE consists of 11 sections, each evaluating a different cognitive domain. These sections are designed to assess a range of cognitive functions, from basic arithmetic and memory to more complex tasks such as repetition and naming. The sum of the scores from all 11 sections yields the total MMSE score. The maximum score is achieved when the patient responds correctly to all items, indicating optimal cognitive function.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the MMSE is not divided into sections that assess only a few cognitive functions.
**Option B:** This option is incorrect because the MMSE has more than 5 sections, making this option a gross underestimation of the total number of items.
**Option C:** This option is incorrect because the MMSE is not a purely memory-based test; it assesses a wide range of cognitive functions.

**Clinical Pearl / High-Yield Fact**
The MMSE is a quick and practical tool for screening cognitive impairment in various clinical settings, including geriatric medicine and neurology. However, it should not be used as the sole diagnostic criterion for dementia or other cognitive disorders.

**Correct Answer: D. 30**