Explanation:

- Common intention (Option 1): Refers to the mutual agreement between parties to accomplish a purpose. This is central to forming contracts.

- Meeting of minds (Option 2): ? The agreement between parties to the same terms. It is crucial for contract formation, ensuring both sides understand and accept the terms.

- Theme of contract (Option 3): Represents the overall subject or central focus of a contract. It outlines the main objective and purpose.

- None of the above (Option 4): Implies none of the options listed correctly relate to the term in question.

Correct Answer: Option 2, meeting of minds