The correct answer is (a) Written agreement.
Section 85-A of the Indian Evidence Act, 1872 states that “Where a party to a contract has made a written admission of the existence of the contract, the contract shall be presumed to exist and to be of the contents admitted.”
This means that if one party to a contract has written down that the contract exists, the court will presume that the contract does exist and that it is of the contents that have been admitted.
This presumption can be rebutted by evidence to the contrary, but it is a strong presumption and will often be enough to prove the existence of a contract.
Option (b), Oral agreement, is incorrect because section 85-A only applies to written agreements.
Option (c), Electronic agreement, is incorrect because section 85-A does not specifically mention electronic agreements. However, it is likely that the courts would apply the same presumption to electronic agreements as they do to written agreements.
Option (d), None of the above, is incorrect because section 85-A does apply to written agreements.