Step 1: Understanding Human Racial Classifications.
Traditional human racial classifications grouped people into categories based on physical and geographical traits. These categories have changed over time but typically included:
- Caucasoid: Individuals of European, Middle Eastern, and South Asian descent, often with lighter skin.
- Australoid: Indigenous peoples of Australia and the Pacific Islands, often with dark skin and curly hair.
- Negroid: Populations of Sub-Saharan African origin, characterized by darker skin and other physical traits.
- Mongoloid: Peoples from East Asia, Southeast Asia, and the Americas, often identified by specific facial features like epicanthic folds.
Step 2: Conclusion.
The primary traditional categories of human racial classification based on physical characteristics were Caucasoid, Australoid, and Mongoloid. The term Negroid, while historically used, is now considered obsolete and not commonly employed.
Final Answer: \[\boxed{\text{The correct answer is (1) (A), (B) and (D) only.}}\]