किसी व्यक्ति की मानसिक आयु मुख्य रूप से किसके माध्यम से निर्धारित की जाती है?

Match List I (Category of Intellectual Disability) with List II (IQ Level range) and choose the correct option: List I a. Mild b. Moderate c. Severe d. Profound List II i. Below 20 ii. 50 – 69 iii. 20 – 34 iv. 35 – 49

Which of the following represents the correct chronological order in which the theories/models of intelligence were introduced by these psychologists?