**Core Concept**
The Wechsler Intelligence Scale is a **psychological test** designed to measure **intelligence** in adults and children. It assesses various aspects of cognitive functioning, including verbal comprehension, visual-spatial skills, and working memory. The scale provides an **Intelligence Quotient (IQ)** score, which is used to categorize individuals into different levels of intellectual functioning.

**Why the Correct Answer is Right**
An **imbecile** is an obsolete term that was historically used to describe individuals with moderate **intellectual disability**. According to the Wechsler Intelligence Scale, an imbecile typically has an IQ score between 26-50. This range indicates significant cognitive impairment, with difficulties in adapting to everyday life and learning new skills.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it represents a higher IQ range, which is not characteristic of an imbecile.
**Option B:** This option is also incorrect as it falls within the range of **moron**, another obsolete term for individuals with mild intellectual disability.
**Option D:** This option is incorrect because it represents a lower IQ range, which is characteristic of **idiots**, a term used to describe individuals with severe intellectual disability.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the terms **imbecile**, **moron**, and **idiot** are now considered outdated and derogatory. The current classification system uses more respectful and specific terms, such as **mild**, **moderate**, **severe**, and **profound intellectual disability**.

**Correct Answer:** D. 26-50