On the basis of nature and quality of social interaction groups has been classified into:

Social groups are essential components of human interaction, and they vary in terms of structure, dynamics, and the type of interactions that occur within them.

• These groups are classified based on factors such as size, the nature of social interactions, and the type of membership.

Key Points

• On the basis of the nature and quality of social interaction, groups are classified into Primary and Secondary groups.
• Primary groups are characterized by close, personal, and direct interactions. These groups typically include family and close friends, where relationships are intimate, and emotional bonds are strong.
• Secondary groups, on the other hand, are more impersonal and formal. They are typically larger and involve goal-oriented interactions, such as in work environments or professional associations.

Hint

• Other classifications like Genetic and Congregate Groups, Small and Large Groups, and Involuntary and Voluntary Groups refer to different ways groups can be categorized but do not directly address the nature and quality of social interactions in the same way as the primary and secondary distinction.

Hence, the correct answer is 'Primary and Secondary'.