Final answer:
The result is an IQ score. IQ stands for intelligence quotient and is a measure of cognitive abilities.
Step-by-step explanation:
The result of dividing mental age by chronological age and multiplying the result by 100 is called an IQ score (Option a).
IQ stands for intelligence quotient and is a score earned on a test designed to measure intelligence. It is a way to compare an individual's cognitive abilities to the average performance of people in the same age group.
For example, if an individual has a mental age of 10 and a chronological age of 8, the IQ score would be (10/8) x 100 = 125. This indicates that the individual's cognitive abilities are higher than the average for their age group.