true or false.

True or False. 1. An obligation is a juridical necessity to give, to do or not to do. 2. The sources of obligations under Article 1157 are exclusive. 3. A passive subject is otherwise called the creditor. 4. An active subject is otherwise called the debtor. 5. The passive subject has the right to the fulfilment of the obligation b. The active subject has the duty to perform the obligation. 7. An obligation can exist even if there is no active subject. 8. A wrong is otherwise called the cause of action. 9. A cause of action can arise even in the absence of a violation of one's right. 10. Real obligations refers to those which there is an obligation to give. 11. Personal obligations refers to matters wherein the subject matter is a service. 12. Negative Personal Obligations refers to obligations not to do. 13. Negotiorium Gestio and Solutiondebtii are examples of Quasi Delicts. 14. In a Quasi Contract, consent of the parties is required for the obligation to be demandable. 15. Crimes are otherwise called Delicts. 16. A contract which has illegal considerations are valid sources of obligations under article 1157 of the Civil Code. 17. Mora Solvendi is the delay on the part of the Creditor. 18. Mora Accipiendi is the delay on the part of the Debtor. 19. Indemnification is the return of the thing stolen in criminal cases. 20. The essential elements of a contract are: Consent, Object and Consummation