The correct answer is (d) 12 years old.
The Indian Evidence Act, 1872, does not specifically mention the legality of digital signatures on electronic records. However, Section 65B of the Act provides that “the Court shall presume that any electronic record purporting to be signed by a person is so signed unless the contrary is proved.” This means that the Court will presume that a digital signature is valid unless there is evidence to suggest otherwise.
The 12-year period is based on the assumption that digital signatures are typically valid for 12 years. However, it is important to note that this is just an assumption and the actual validity period may be shorter or longer.
It is also important to note that the Court’s presumption is not conclusive. The other party can still challenge the validity of the digital signature by providing evidence to suggest that it is not genuine.
The other options are incorrect because they are not mentioned in the Indian Evidence Act, 1872.