**Core Concept**
Normal average IQ refers to the average intelligence quotient, a numerical value used to express an individual's cognitive abilities in comparison to the general population. IQ scores are standardized to have a mean of 100 and a standard deviation of 15, representing the distribution of intelligence in a given population.

**Why the Correct Answer is Right**
IQ scores are calculated based on standardized tests, such as the Wechsler Adult Intelligence Scale (WAIS), which assess verbal comprehension, visual-spatial skills, working memory, and processing speed. The average IQ score of 100 represents the midpoint of the normal distribution, indicating that a score of 100 is neither exceptionally high nor low. The standard deviation of 15 accounts for the variability in intelligence among individuals, with about 68% of the population scoring between 85 and 115.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because IQ scores are typically measured on a continuous scale, and there is no universally accepted "normal" IQ score.
**Option B:** This option is incorrect because IQ scores are not necessarily representative of real-world intelligence or academic achievement.
**Option C:** This option is incorrect because IQ scores are not directly correlated with other cognitive abilities, such as creativity or emotional intelligence.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that IQ scores are not fixed and can be influenced by various factors, including education, socio-economic status, and access to resources. Moreover, IQ scores should not be used as the sole criterion for academic or professional evaluation.

**Correct Answer: A. 100**