Explanation:

- Option 1: Valid

- A valid contract requires free consent, lawful consideration, lawful object, and competent parties. Without free consent, it is not valid.

- Option 2: Void

- A void agreement is one that is not enforceable by law from the beginning. Lack of free consent doesn't automatically make an agreement void.

- Option 3: Voidable

- A voidable contract is one where one party's consent was not freely given. It remains valid until the aggrieved party decides to void it.

- Option 4: Illegal

- An illegal agreement is one that violates the law. Lack of free consent alone doesn't make an agreement illegal.