A corporate manager who starts a new initiative for their company/organisation which entails setting up a new distinct business unit can be regarded as :

An intrapreneur is a corporate manager or employee who takes the initiative within an organization to create a new business unit, product, or service. They act like entrepreneurs but work within the structure and resources of an existing organization. Intrapreneurs bring innovative ideas to life while leveraging the company's support.

Ecopreneur: Focuses on environmental sustainability and creates businesses that contribute to ecological well-being.

Technopreneur: An entrepreneur who specializes in technology-based ventures.

Businessman/Businesswoman: Refers to individuals engaged in traditional business operations, typically outside the scope of intrapreneurship.

Hence, answer is Option C lntrapreneur