The correct answer is option 2: To refuse to give his/her sample of handwriting as evidence to support a prosecution against him/her.

Option 1 states that a person has the fundamental right to be protected against prosecution and punishment for the same offense more than once. This means that an individual cannot be tried and punished multiple times for the same crime, which is protected under the principle of double jeopardy.

Option 3 states that a person has the right not to act as a witness against himself/herself. This means that an individual cannot be compelled to testify or provide evidence that may incriminate them in a criminal case, as per the principle of self-incrimination.

Option 4 states that a person has the right not to be convicted of any offense except for the violation of a law already in force at the time of committing the act. This means that a person should not be convicted retroactively for an action that was not illegal when it occurred.

Option 2, on the other hand, states that a person does not have the right to refuse to give their sample of handwriting as evidence. This means that if the authorities require a person`s handwriting sample as evidence in a prosecution, the person cannot refuse to provide it.