Explanation:

- The Transfer of Property Act defines "living person" in Section 5.

- It states that "living person" includes both an individual (human being) and a company or association or body of individuals—whether incorporated or not.

- Option 1: Human Being

Covered, as a human is a living person.

- Option 2: Limited Company

Also covered. A company is a body of individuals, incorporated.

- Option 3: Partnership Firm

Covered, as partnership firm is an association of persons.

- Option 4: All mention here

Correct. All these fit under the definition in the Act.