A male child of 15 years, with a mental age of 9 years has an IQ of:

**Core Concept**
The question requires the calculation of an individual's Intelligence Quotient (IQ) using the Intelligence Quotient formula: IQ = (Mental Age / Chronological Age) x 100. This formula is used to estimate an individual's cognitive abilities relative to their age.

**Why the Correct Answer is Right**
To calculate the IQ, we divide the mental age (9 years) by the chronological age (15 years), which gives 0.6. Then, we multiply this ratio by 100 to get the IQ. IQ = (9 / 15) x 100 = 60. This indicates that the child's cognitive abilities are below average.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not provided, making it impossible to determine its accuracy.
* **Option B:** Without the actual value, it's impossible to evaluate its correctness.
* **Option C:** Typically, the correct IQ value is 60, not this option, which would be incorrect.

**Clinical Pearl / High-Yield Fact**
The Wechsler Intelligence Scale for Children (WISC) and Wechsler Adult Intelligence Scale (WAIS) are widely used standardized tests to measure cognitive abilities in children and adults, respectively. These tests assess various aspects of intelligence, including verbal comprehension, visual-spatial skills, and working memory.

**Correct Answer:** C. 60