An intelligence test is reliable if it gives consistent answers on different occasions. It is valid if it actually measures intelligence.
An individually administered test that measures a person's ability to solve problems, form concepts, reason, and acquire other intellectual tasks in order to determine their level of intelligence.
The Wechsler Adult Intelligence Scale, Stanford-Binet IQ test, and the Wechsler Intelligence Scale for Children are some examples.
Thus, the correct option is B reliable and valid.
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