Explanation:

- Unlawful consideration means the agreement is based on something that is forbidden by law, like committing a crime.

- Public policy refers to agreements that are harmful to society, or go against the interests/morals of the public, even if not specifically illegal.

- Sometimes, an agreement can be void for both reasons, when the consideration is unlawful and also against public policy.

- If the question situation concerns a contract that is simply against public morals or societal interest (even if not directly illegal), then it is void on the ground of public policy.

- If it directly involves forbidden acts or illegal consideration, then option 1 applies.

- If both apply, consider option 3.

- If neither applies, then option 4.

Correct Answer: Option 2 - Public policy