Robert K. Merton has defined "the complex of different and distinct statuses occupied by a single individual" is called

The correct answer is Status set.​
Key Points

• A status set encompasses all the statuses a person holds at any given time. These statuses represent positions within society or a social group.

• Variety of Sources: Statuses can originate from various aspects of life, including one’s profession, family roles (parent, child, spouse), education level (student, graduate), and even hobbies (club member, athlete).

• Dynamic Nature: An individual's status set changes over time as they enter or exit different roles. For example, graduating from college, becoming a parent, or retiring from a job all alter one's status set.

• Influence on Identity and Interactions: The combination of statuses influences how individuals see themselves and how they are perceived by others. It also affects their interactions within different social circles.

Thus, Robert K. Merton has defined "the complex of different and distinct statuses occupied by a single individual" is called Status set.