Start-up firms are commonly classified based on the objectives and growth orientation of entrepreneurs. Recognized types include:

• Salary-substitute firms → Created mainly to provide income/employment to the owner.

• Lifestyle firms → Established to support a desired lifestyle rather than aggressive growth.

• Entrepreneurial firms → Growth-oriented, innovative, and scalable ventures.

Ordinance firms do not represent any recognized category of start-up firms in entrepreneurship theory.

❌ Why the other options are incorrect:

• Salary-substitute firms ❌
  A valid type of start-up focused on self-employment income.

• Lifestyle firms ❌
  A recognized type emphasizing work–life balance over growth.

• Entrepreneurial firms ❌
  A core category of start-ups with high growth potential.

✅ Final Answer: Ordinance firms