Explanation:

- An agreement between ice manufacturers to not sell below a fixed price and to share profits is a form of a cartel or price-fixing arrangement.

- Such agreements are typically against public policy and violate the law (like the Competition Act in India or similar laws elsewhere) because they restrict free competition and harm consumers.

- Valid means the agreement can be enforced by law. But in this case, such agreements are unlawful.

- Void means the agreement has no legal effect from the start.

- Enforceable means courts will make parties follow it. This does not apply here due to its illegality.

- Voidable means one party can cancel the agreement under certain conditions; not relevant here.

- Therefore, the correct answer is:

Option:2, Void