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 formula: IQ = (Mental Age / Actual Age) x 100. This formula is based on the concept of mental age, which is a measure of an individual's cognitive abilities relative to their age group.

**Why the Correct Answer is Right**
To calculate the IQ, we need to divide the mental age (9 years) by the actual age (15 years) and multiply by 100. This gives us an IQ of (9/15) x 100 = 60. The correct answer is option D, which represents the calculated IQ.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided. Please disregard.
**Option B:** This option is not provided. Please disregard.
**Option C:** This option is not provided. Please disregard.

**Clinical Pearl / High-Yield Fact**
It's essential to note that IQ scores have a mean of 100 and a standard deviation of 15 in the general population. An IQ of 60 is considered to be within the range of mild intellectual disability.

**Correct Answer:** D. 60