Explanation:

- Option 1, Section 37: This section pertains to obligation of parties to a contract to perform or offer to perform their respective promises, unless dispensed with or excused under the provisions of the Act.

- Option 2, Section 36: This section speaks about the effect of refusal of a party to perform rather than related to tender of performance.

- Option 3, Section 38: This is the correct answer. It specifically deals with the law relating to the tender of performance, stating how a promisor can offer to perform the promise.

- Option 4, Section 35: This section refers to when an offer lapses and not related to tender of performance.